1382326861 has 4 divisors (see below), whose sum is σ = 1382729724. Its totient is φ = 1381924000.

The previous prime is 1382326837. The next prime is 1382326873. The reversal of 1382326861 is 1686232831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1686232831 = 43 ⋅39214717.

It can be written as a sum of positive squares in 2 ways, for example, as 450245961 + 932080900 = 21219^2 + 30530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382326861 - 2⁷ = 1382326733 is a prime.

It is a super-2 number, since 2×1382326861² = 3821655101284226642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1382326061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196240 + ... + 203161.

It is an arithmetic number, because the mean of its divisors is an integer number (345682431).

Almost surely, 2^1382326861 is an apocalyptic number.

It is an amenable number.

1382326861 is a deficient number, since it is larger than the sum of its proper divisors (402863).

1382326861 is an equidigital number, since it uses as much as digits as its factorization.

1382326861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402862.

The product of its digits is 82944, while the sum is 40.

The square root of 1382326861 is about 37179.6565476337. The cubic root of 1382326861 is about 1113.9616738198.

The spelling of 1382326861 in words is "one billion, three hundred eighty-two million, three hundred twenty-six thousand, eight hundred sixty-one".