315097973 has 2 divisors, whose sum is σ = 315097974. Its totient is φ = 315097972.

The previous prime is 315097943. The next prime is 315098029. The reversal of 315097973 is 379790513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165842884 + 149255089 = 12878^2 + 12217^2 .

It is a cyclic number.

It is not a de Polignac number, because 315097973 - 2²⁰ = 314049397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315097903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157548986 + 157548987.

It is an arithmetic number, because the mean of its divisors is an integer number (157548987).

Almost surely, 2^315097973 is an apocalyptic number.

It is an amenable number.

315097973 is a deficient number, since it is larger than the sum of its proper divisors (1).

315097973 is an equidigital number, since it uses as much as digits as its factorization.

315097973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 178605, while the sum is 44.

The square root of 315097973 is about 17750.9992113120. Note that the first 3 decimals coincide. The cubic root of 315097973 is about 680.4797457982.

The spelling of 315097973 in words is "three hundred fifteen million, ninety-seven thousand, nine hundred seventy-three".