86992791 has 16 divisors (see below), whose sum is σ = 123948000. Its totient is φ = 54079488.

The previous prime is 86992753. The next prime is 86992799. The reversal of 86992791 is 19729968.

It is a happy number.

It is not a de Polignac number, because 86992791 - 2¹⁰ = 86991767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86992799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2266 + ... + 13383.

It is an arithmetic number, because the mean of its divisors is an integer number (7746750).

Almost surely, 2^86992791 is an apocalyptic number.

86992791 is a deficient number, since it is larger than the sum of its proper divisors (36955209).

86992791 is a wasteful number, since it uses less digits than its factorization.

86992791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15778.

The product of its digits is 489888, while the sum is 51.

The square root of 86992791 is about 9326.9926021199. The cubic root of 86992791 is about 443.0925229722.

The spelling of 86992791 in words is "eighty-six million, nine hundred ninety-two thousand, seven hundred ninety-one".