315920397 has 32 divisors (see below), whose sum is σ = 464002560. Its totient is φ = 190008000.

The previous prime is 315920369. The next prime is 315920419. The reversal of 315920397 is 793029513.

It is not a de Polignac number, because 315920397 - 2¹⁸ = 315658253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315920347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577278 + ... + 577824.

It is an arithmetic number, because the mean of its divisors is an integer number (14500080).

Almost surely, 2^315920397 is an apocalyptic number.

It is an amenable number.

315920397 is a deficient number, since it is larger than the sum of its proper divisors (148082163).

315920397 is a wasteful number, since it uses less digits than its factorization.

315920397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 315920397 is about 17774.1496843028. The cubic root of 315920397 is about 681.0712620112.

The spelling of 315920397 in words is "three hundred fifteen million, nine hundred twenty thousand, three hundred ninety-seven".