85312547 has 4 divisors (see below), whose sum is σ = 85409616. Its totient is φ = 85215480.

The previous prime is 85312529. The next prime is 85312583. The reversal of 85312547 is 74521358.

It is a happy number.

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 85312547 - 2²² = 81118243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85312247) 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, 47204 + ... + 48977.

It is an arithmetic number, because the mean of its divisors is an integer number (21352404).

Almost surely, 2^85312547 is an apocalyptic number.

85312547 is a deficient number, since it is larger than the sum of its proper divisors (97069).

85312547 is an equidigital number, since it uses as much as digits as its factorization.

85312547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97068.

The product of its digits is 33600, while the sum is 35.

The square root of 85312547 is about 9236.4791452155. The cubic root of 85312547 is about 440.2212162411.

The spelling of 85312547 in words is "eighty-five million, three hundred twelve thousand, five hundred forty-seven".