86256691 has 4 divisors (see below), whose sum is σ = 91330632. Its totient is φ = 81182752.

The previous prime is 86256689. The next prime is 86256763. The reversal of 86256691 is 19665268.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 86256691 - 2¹ = 86256689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86256091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536945 + ... + 2536978.

It is an arithmetic number, because the mean of its divisors is an integer number (22832658).

Almost surely, 2^86256691 is an apocalyptic number.

86256691 is a deficient number, since it is larger than the sum of its proper divisors (5073941).

86256691 is a wasteful number, since it uses less digits than its factorization.

86256691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073940.

The product of its digits is 155520, while the sum is 43.

The square root of 86256691 is about 9287.4480348479. The cubic root of 86256691 is about 441.8392210220.

The spelling of 86256691 in words is "eighty-six million, two hundred fifty-six thousand, six hundred ninety-one".