86692991 has 24 divisors (see below), whose sum is σ = 114656640. Its totient is φ = 63985680.

The previous prime is 86692987. The next prime is 86692993. The reversal of 86692991 is 19929668.

It is not a de Polignac number, because 86692991 - 2² = 86692987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86692993) 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, 13400 + ... + 18786.

It is an arithmetic number, because the mean of its divisors is an integer number (4777360).

Almost surely, 2^86692991 is an apocalyptic number.

86692991 is a deficient number, since it is larger than the sum of its proper divisors (27963649).

86692991 is a wasteful number, since it uses less digits than its factorization.

86692991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435 (or 5424 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 86692991 is about 9310.9070986666. The cubic root of 86692991 is about 442.5829327360.

The spelling of 86692991 in words is "eighty-six million, six hundred ninety-two thousand, nine hundred ninety-one".