85479581 has 4 divisors (see below), whose sum is σ = 93250464. Its totient is φ = 77708700.

The previous prime is 85479557. The next prime is 85479593. The reversal of 85479581 is 18597458.

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 a cyclic number.

It is not a de Polignac number, because 85479581 - 2²² = 81285277 is a prime.

It is a super-2 number, since 2×85479581² = 14613517535871122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85479521) 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, 3885425 + ... + 3885446.

It is an arithmetic number, because the mean of its divisors is an integer number (23312616).

Almost surely, 2^85479581 is an apocalyptic number.

It is an amenable number.

85479581 is a deficient number, since it is larger than the sum of its proper divisors (7770883).

85479581 is a wasteful number, since it uses less digits than its factorization.

85479581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770882.

The product of its digits is 403200, while the sum is 47.

The square root of 85479581 is about 9245.5168054577. The cubic root of 85479581 is about 440.5083329502.

The spelling of 85479581 in words is "eighty-five million, four hundred seventy-nine thousand, five hundred eighty-one".