85613947 has 4 divisors (see below), whose sum is σ = 85632496. Its totient is φ = 85595400.

The previous prime is 85613917. The next prime is 85613977. The reversal of 85613947 is 74931658.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (85613917) and next prime (85613977).

It is a cyclic number.

It is not a de Polignac number, because 85613947 - 2¹¹ = 85611899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85613917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3697 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (21408124).

Almost surely, 2^85613947 is an apocalyptic number.

85613947 is a deficient number, since it is larger than the sum of its proper divisors (18549).

85613947 is an equidigital number, since it uses as much as digits as its factorization.

85613947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18548.

The product of its digits is 181440, while the sum is 43.

The square root of 85613947 is about 9252.7805010170. The cubic root of 85613947 is about 440.7390249106.

The spelling of 85613947 in words is "eighty-five million, six hundred thirteen thousand, nine hundred forty-seven".