85478913 has 12 divisors (see below), whose sum is σ = 132967380. Its totient is φ = 52602336.

The previous prime is 85478909. The next prime is 85478923. The reversal of 85478913 is 31987458.

It can be written as a sum of positive squares in 2 ways, for example, as 19820304 + 65658609 = 4452^2 + 8103^2 .

It is not a de Polignac number, because 85478913 - 2² = 85478909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85478923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 365178 + ... + 365411.

It is an arithmetic number, because the mean of its divisors is an integer number (11080615).

Almost surely, 2^85478913 is an apocalyptic number.

It is an amenable number.

85478913 is a deficient number, since it is larger than the sum of its proper divisors (47488467).

85478913 is a wasteful number, since it uses less digits than its factorization.

85478913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730608 (or 730605 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 85478913 is about 9245.4806797700. The cubic root of 85478913 is about 440.5071854624.

The spelling of 85478913 in words is "eighty-five million, four hundred seventy-eight thousand, nine hundred thirteen".