86231977 has 4 divisors (see below), whose sum is σ = 92865220. Its totient is φ = 79598736.

The previous prime is 86231947. The next prime is 86231983. The reversal of 86231977 is 77913268.

It is a happy number.

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 21123216 + 65108761 = 4596^2 + 8069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86231977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86231927) 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, 3316602 + ... + 3316627.

It is an arithmetic number, because the mean of its divisors is an integer number (23216305).

Almost surely, 2^86231977 is an apocalyptic number.

It is an amenable number.

86231977 is a deficient number, since it is larger than the sum of its proper divisors (6633243).

86231977 is a wasteful number, since it uses less digits than its factorization.

86231977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633242.

The product of its digits is 127008, while the sum is 43.

The square root of 86231977 is about 9286.1174341056. The cubic root of 86231977 is about 441.7970188560.

The spelling of 86231977 in words is "eighty-six million, two hundred thirty-one thousand, nine hundred seventy-seven".