85235891 has 4 divisors (see below), whose sum is σ = 91792512. Its totient is φ = 78679272.

The previous prime is 85235867. The next prime is 85235939. The reversal of 85235891 is 19853258.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85235891 is a prime.

It is a super-2 number, since 2×85235891² = 14530314229127762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85235791) 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, 3278291 + ... + 3278316.

It is an arithmetic number, because the mean of its divisors is an integer number (22948128).

Almost surely, 2^85235891 is an apocalyptic number.

85235891 is a deficient number, since it is larger than the sum of its proper divisors (6556621).

85235891 is a wasteful number, since it uses less digits than its factorization.

85235891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556620.

The product of its digits is 86400, while the sum is 41.

The square root of 85235891 is about 9232.3285795080. The cubic root of 85235891 is about 440.0893258727.

The spelling of 85235891 in words is "eighty-five million, two hundred thirty-five thousand, eight hundred ninety-one".