997465957 has 2 divisors, whose sum is σ = 997465958. Its totient is φ = 997465956.

The previous prime is 997465919. The next prime is 997465979. The reversal of 997465957 is 759564799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 921183201 + 76282756 = 30351^2 + 8734^2 .

It is a cyclic number.

It is not a de Polignac number, because 997465957 - 2⁷ = 997465829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997465895 and 997465904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997465057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498732978 + 498732979.

It is an arithmetic number, because the mean of its divisors is an integer number (498732979).

Almost surely, 2^997465957 is an apocalyptic number.

It is an amenable number.

997465957 is a deficient number, since it is larger than the sum of its proper divisors (1).

997465957 is an equidigital number, since it uses as much as digits as its factorization.

997465957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21432600, while the sum is 61.

The square root of 997465957 is about 31582.6844489192. The cubic root of 997465957 is about 999.1546045079.

The spelling of 997465957 in words is "nine hundred ninety-seven million, four hundred sixty-five thousand, nine hundred fifty-seven".