1867340381 has 4 divisors (see below), whose sum is σ = 1867791612. Its totient is φ = 1866889152.

The previous prime is 1867340369. The next prime is 1867340411. The reversal of 1867340381 is 1830437681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 952277881 + 915062500 = 30859^2 + 30250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1867340381 is a prime.

It is a super-2 number, since 2×1867340381² = 6973920197026450322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1867340081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219350 + ... + 227703.

It is an arithmetic number, because the mean of its divisors is an integer number (466947903).

Almost surely, 2^1867340381 is an apocalyptic number.

It is an amenable number.

1867340381 is a deficient number, since it is larger than the sum of its proper divisors (451231).

1867340381 is an equidigital number, since it uses as much as digits as its factorization.

1867340381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451230.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 1867340381 is about 43212.7340144083. The cubic root of 1867340381 is about 1231.4246125931.

The spelling of 1867340381 in words is "one billion, eight hundred sixty-seven million, three hundred forty thousand, three hundred eighty-one".