86959521 has 16 divisors (see below), whose sum is σ = 140541120. Its totient is φ = 52702560.

The previous prime is 86959513. The next prime is 86959547. The reversal of 86959521 is 12595968.

It is not a de Polignac number, because 86959521 - 2³ = 86959513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86959121) 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, 146100 + ... + 146693.

It is an arithmetic number, because the mean of its divisors is an integer number (8783820).

Almost surely, 2^86959521 is an apocalyptic number.

It is an amenable number.

86959521 is a deficient number, since it is larger than the sum of its proper divisors (53581599).

86959521 is a wasteful number, since it uses less digits than its factorization.

86959521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292813 (or 292807 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 86959521 is about 9325.2088984644. The cubic root of 86959521 is about 443.0360295250.

The spelling of 86959521 in words is "eighty-six million, nine hundred fifty-nine thousand, five hundred twenty-one".