86997905 has 8 divisors (see below), whose sum is σ = 104668200. Its totient is φ = 69417856.

The previous prime is 86997899. The next prime is 86997913. The reversal of 86997905 is 50979968.

It can be written as a sum of positive squares in 4 ways, for example, as 8976016 + 78021889 = 2996^2 + 8833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86997905 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20420 + ... + 24309.

It is an arithmetic number, because the mean of its divisors is an integer number (13083525).

Almost surely, 2^86997905 is an apocalyptic number.

It is an amenable number.

86997905 is a deficient number, since it is larger than the sum of its proper divisors (17670295).

86997905 is a wasteful number, since it uses less digits than its factorization.

86997905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45123.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 86997905 is about 9327.2667486247. The cubic root of 86997905 is about 443.1012054187.

The spelling of 86997905 in words is "eighty-six million, nine hundred ninety-seven thousand, nine hundred five".