85405913 has 4 divisors (see below), whose sum is σ = 86365620. Its totient is φ = 84446208.

The previous prime is 85405907. The next prime is 85405939. The reversal of 85405913 is 31950458.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36517849 + 48888064 = 6043^2 + 6992^2 .

It is a cyclic number.

It is not a de Polignac number, because 85405913 - 2⁴ = 85405897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85405013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479720 + ... + 479897.

It is an arithmetic number, because the mean of its divisors is an integer number (21591405).

Almost surely, 2^85405913 is an apocalyptic number.

It is an amenable number.

85405913 is a deficient number, since it is larger than the sum of its proper divisors (959707).

85405913 is an equidigital number, since it uses as much as digits as its factorization.

85405913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959706.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 85405913 is about 9241.5319617475. The cubic root of 85405913 is about 440.3817503037.

The spelling of 85405913 in words is "eighty-five million, four hundred five thousand, nine hundred thirteen".