86497691 has 18 divisors (see below), whose sum is σ = 104258700. Its totient is φ = 71550192.

The previous prime is 86497679. The next prime is 86497693. The reversal of 86497691 is 19679468.

It is not a de Polignac number, because 86497691 - 2¹⁰ = 86496667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86497693) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40160 + ... + 42258.

It is an arithmetic number, because the mean of its divisors is an integer number (5792150).

Almost surely, 2^86497691 is an apocalyptic number.

86497691 is a deficient number, since it is larger than the sum of its proper divisors (17761009).

86497691 is a wasteful number, since it uses less digits than its factorization.

86497691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2135 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 86497691 is about 9300.4134854317. The cubic root of 86497691 is about 442.2503359309.

The spelling of 86497691 in words is "eighty-six million, four hundred ninety-seven thousand, six hundred ninety-one".