85291091 has 8 divisors (see below), whose sum is σ = 91154160. Its totient is φ = 79522048.

The previous prime is 85291081. The next prime is 85291097. The reversal of 85291091 is 19019258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85291091 - 2¹⁰ = 85290067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85291097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21626 + ... + 25263.

It is an arithmetic number, because the mean of its divisors is an integer number (11394270).

Almost surely, 2^85291091 is an apocalyptic number.

85291091 is a deficient number, since it is larger than the sum of its proper divisors (5863069).

85291091 is a wasteful number, since it uses less digits than its factorization.

85291091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47013.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 85291091 is about 9235.3175906408. The cubic root of 85291091 is about 440.1843081164.

The spelling of 85291091 in words is "eighty-five million, two hundred ninety-one thousand, ninety-one".