86972775 has 48 divisors (see below), whose sum is σ = 151609344. Its totient is φ = 43908480.

The previous prime is 86972749. The next prime is 86972777. The reversal of 86972775 is 57727968.

It is not a de Polignac number, because 86972775 - 2¹⁶ = 86907239 is a prime.

Its product of digits (1481760) is a multiple of the sum of its prime factors (560).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86972777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218877 + ... + 219273.

It is an arithmetic number, because the mean of its divisors is an integer number (3158528).

Almost surely, 2^86972775 is an apocalyptic number.

86972775 is a deficient number, since it is larger than the sum of its proper divisors (64636569).

86972775 is a wasteful number, since it uses less digits than its factorization.

86972775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 555 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 51.

The square root of 86972775 is about 9325.9195257090. The cubic root of 86972775 is about 443.0585369367.

The spelling of 86972775 in words is "eighty-six million, nine hundred seventy-two thousand, seven hundred seventy-five".