86726991 has 16 divisors (see below), whose sum is σ = 126645120. Its totient is φ = 52464480.

The previous prime is 86726987. The next prime is 86726999. The reversal of 86726991 is 19962768.

It is not a de Polignac number, because 86726991 - 2² = 86726987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86726991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86726999) 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, 16545 + ... + 21146.

It is an arithmetic number, because the mean of its divisors is an integer number (7915320).

Almost surely, 2^86726991 is an apocalyptic number.

86726991 is a deficient number, since it is larger than the sum of its proper divisors (39918129).

86726991 is a wasteful number, since it uses less digits than its factorization.

86726991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37766.

The product of its digits is 326592, while the sum is 48.

The square root of 86726991 is about 9312.7327353468. The cubic root of 86726991 is about 442.6407838293.

The spelling of 86726991 in words is "eighty-six million, seven hundred twenty-six thousand, nine hundred ninety-one".