85790881 has 4 divisors (see below), whose sum is σ = 93590064. Its totient is φ = 77991700.

The previous prime is 85790869. The next prime is 85790893. The reversal of 85790881 is 18809758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (85790869) and next prime (85790893).

It is a cyclic number.

It is not a de Polignac number, because 85790881 - 2⁵ = 85790849 is a prime.

It is a super-2 number, since 2×85790881² = 14720150525512322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85790821) 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, 3899575 + ... + 3899596.

It is an arithmetic number, because the mean of its divisors is an integer number (23397516).

Almost surely, 2^85790881 is an apocalyptic number.

It is an amenable number.

85790881 is a deficient number, since it is larger than the sum of its proper divisors (7799183).

85790881 is a wasteful number, since it uses less digits than its factorization.

85790881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799182.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 85790881 is about 9262.3366922176. The cubic root of 85790881 is about 441.0424336528.

The spelling of 85790881 in words is "eighty-five million, seven hundred ninety thousand, eight hundred eighty-one".