86525891 has 4 divisors (see below), whose sum is σ = 86618784. Its totient is φ = 86433000.

The previous prime is 86525863. The next prime is 86525897. The reversal of 86525891 is 19852568.

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

It is a cyclic number.

It is not a de Polignac number, because 86525891 - 2⁶ = 86525827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86525897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45035 + ... + 46916.

It is an arithmetic number, because the mean of its divisors is an integer number (21654696).

Almost surely, 2^86525891 is an apocalyptic number.

86525891 is a deficient number, since it is larger than the sum of its proper divisors (92893).

86525891 is an equidigital number, since it uses as much as digits as its factorization.

86525891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92892.

The product of its digits is 172800, while the sum is 44.

The square root of 86525891 is about 9301.9294235121. The cubic root of 86525891 is about 442.2983915660.

The spelling of 86525891 in words is "eighty-six million, five hundred twenty-five thousand, eight hundred ninety-one".