85974689 has 4 divisors (see below), whose sum is σ = 86861124. Its totient is φ = 85088256.

The previous prime is 85974683. The next prime is 85974709. The reversal of 85974689 is 98647958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98647958 = 2 ⋅49323979.

It can be written as a sum of positive squares in 2 ways, for example, as 47720464 + 38254225 = 6908^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 85974689 - 2¹² = 85970593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85974683) 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, 443072 + ... + 443265.

It is an arithmetic number, because the mean of its divisors is an integer number (21715281).

Almost surely, 2^85974689 is an apocalyptic number.

It is an amenable number.

85974689 is a deficient number, since it is larger than the sum of its proper divisors (886435).

85974689 is an equidigital number, since it uses as much as digits as its factorization.

85974689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886434.

The product of its digits is 4354560, while the sum is 56.

The square root of 85974689 is about 9272.2537174087. The cubic root of 85974689 is about 441.3571885535.

The spelling of 85974689 in words is "eighty-five million, nine hundred seventy-four thousand, six hundred eighty-nine".