315768997 has 4 divisors (see below), whose sum is σ = 316257696. Its totient is φ = 315280300.

The previous prime is 315768991. The next prime is 315769039. The reversal of 315768997 is 799867513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799867513 = 137 ⋅5838449.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315768997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315768991) 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 3 ways as a sum of consecutive naturals, for example, 243379 + ... + 244672.

It is an arithmetic number, because the mean of its divisors is an integer number (79064424).

Almost surely, 2^315768997 is an apocalyptic number.

It is an amenable number.

315768997 is a deficient number, since it is larger than the sum of its proper divisors (488699).

315768997 is an equidigital number, since it uses as much as digits as its factorization.

315768997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488698.

The product of its digits is 2857680, while the sum is 55.

The square root of 315768997 is about 17769.8901797394. The cubic root of 315768997 is about 680.9624469780.

The spelling of 315768997 in words is "three hundred fifteen million, seven hundred sixty-eight thousand, nine hundred ninety-seven".