1382631905 has 4 divisors (see below), whose sum is σ = 1659158292. Its totient is φ = 1106105520.

The previous prime is 1382631893. The next prime is 1382631923. The reversal of 1382631905 is 5091362831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5091362831 = 461 ⋅11044171.

It can be written as a sum of positive squares in 2 ways, for example, as 854919121 + 527712784 = 29239^2 + 22972^2 .

It is not a de Polignac number, because 1382631905 - 2²² = 1378437601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138263186 + ... + 138263195.

It is an arithmetic number, because the mean of its divisors is an integer number (414789573).

Almost surely, 2^1382631905 is an apocalyptic number.

It is an amenable number.

1382631905 is a deficient number, since it is larger than the sum of its proper divisors (276526387).

1382631905 is an equidigital number, since it uses as much as digits as its factorization.

1382631905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276526386.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1382631905 is about 37183.7586185152. The cubic root of 1382631905 is about 1114.0436086940.

The spelling of 1382631905 in words is "one billion, three hundred eighty-two million, six hundred thirty-one thousand, nine hundred five".