97964865 has 12 divisors (see below), whose sum is σ = 169805844. Its totient is φ = 52247904.

The previous prime is 97964857. The next prime is 97964869. The reversal of 97964865 is 56846979.

It can be written as a sum of positive squares in 2 ways, for example, as 58614336 + 39350529 = 7656^2 + 6273^2 .

It is not a de Polignac number, because 97964865 - 2³ = 97964857 is a prime.

It is a super-2 number, since 2×97964865² = 19194229548936450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97964869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1088454 + ... + 1088543.

It is an arithmetic number, because the mean of its divisors is an integer number (14150487).

Almost surely, 2^97964865 is an apocalyptic number.

It is an amenable number.

97964865 is a deficient number, since it is larger than the sum of its proper divisors (71840979).

97964865 is a wasteful number, since it uses less digits than its factorization.

97964865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177008 (or 2177005 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 97964865 is about 9897.7201920442. The cubic root of 97964865 is about 460.9885247699.

The spelling of 97964865 in words is "ninety-seven million, nine hundred sixty-four thousand, eight hundred sixty-five".