1306657431 has 12 divisors (see below), whose sum is σ = 1887713880. Its totient is φ = 870957360.

The previous prime is 1306657423. The next prime is 1306657477. The reversal of 1306657431 is 1347566031.

It is not a de Polignac number, because 1306657431 - 2³ = 1306657423 is a prime.

It is a super-2 number, since 2×1306657431² = 3414707283975039522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306657411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81076 + ... + 95846.

It is an arithmetic number, because the mean of its divisors is an integer number (157309490).

Almost surely, 2^1306657431 is an apocalyptic number.

1306657431 is a deficient number, since it is larger than the sum of its proper divisors (581056449).

1306657431 is a wasteful number, since it uses less digits than its factorization.

1306657431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24606 (or 24603 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 1306657431 is about 36147.7168158654. The cubic root of 1306657431 is about 1093.2527561102.

The spelling of 1306657431 in words is "one billion, three hundred six million, six hundred fifty-seven thousand, four hundred thirty-one".