86617971 has 24 divisors (see below), whose sum is σ = 141054480. Its totient is φ = 52493760.

The previous prime is 86617967. The next prime is 86617981. The reversal of 86617971 is 17971668.

It is not a de Polignac number, because 86617971 - 2² = 86617967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86617981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9990 + ... + 16523.

It is an arithmetic number, because the mean of its divisors is an integer number (5877270).

Almost surely, 2^86617971 is an apocalyptic number.

86617971 is a deficient number, since it is larger than the sum of its proper divisors (54436509).

86617971 is a wasteful number, since it uses less digits than its factorization.

86617971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26544 (or 26527 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 86617971 is about 9306.8776181918. The cubic root of 86617971 is about 442.4552324719.

The spelling of 86617971 in words is "eighty-six million, six hundred seventeen thousand, nine hundred seventy-one".