997560965 has 16 divisors (see below), whose sum is σ = 1221224688. Its totient is φ = 781986816.

The previous prime is 997560961. The next prime is 997560983. The reversal of 997560965 is 569065799.

It can be written as a sum of positive squares in 8 ways, for example, as 367450561 + 630110404 = 19169^2 + 25102^2 .

It is a cyclic number.

It is not a de Polignac number, because 997560965 - 2² = 997560961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997560965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997560961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256979 + ... + 260831.

It is an arithmetic number, because the mean of its divisors is an integer number (76326543).

Almost surely, 2^997560965 is an apocalyptic number.

It is an amenable number.

997560965 is a deficient number, since it is larger than the sum of its proper divisors (223663723).

997560965 is a wasteful number, since it uses less digits than its factorization.

997560965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888.

The product of its (nonzero) digits is 4592700, while the sum is 56.

The square root of 997560965 is about 31584.1885284394. The cubic root of 997560965 is about 999.1863264483.

The spelling of 997560965 in words is "nine hundred ninety-seven million, five hundred sixty thousand, nine hundred sixty-five".