86997965 has 4 divisors (see below), whose sum is σ = 104397564. Its totient is φ = 69598368.

The previous prime is 86997961. The next prime is 86997973. The reversal of 86997965 is 56979968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14645929 + 72352036 = 3827^2 + 8506^2 .

It is a cyclic number.

It is not a de Polignac number, because 86997965 - 2² = 86997961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86997961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8699792 + ... + 8699801.

It is an arithmetic number, because the mean of its divisors is an integer number (26099391).

Almost surely, 2^86997965 is an apocalyptic number.

It is an amenable number.

86997965 is a deficient number, since it is larger than the sum of its proper divisors (17399599).

86997965 is a wasteful number, since it uses less digits than its factorization.

86997965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17399598.

The product of its digits is 7348320, while the sum is 59.

The square root of 86997965 is about 9327.2699650005. The cubic root of 86997965 is about 443.1013072835.

The spelling of 86997965 in words is "eighty-six million, nine hundred ninety-seven thousand, nine hundred sixty-five".