85469731 has 2 divisors, whose sum is σ = 85469732. Its totient is φ = 85469730.

The previous prime is 85469677. The next prime is 85469737. The reversal of 85469731 is 13796458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85469731 - 2²⁵ = 51915299 is a prime.

It is a super-2 number, since 2×85469731² = 14610149834424722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85469737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42734865 + 42734866.

It is an arithmetic number, because the mean of its divisors is an integer number (42734866).

Almost surely, 2^85469731 is an apocalyptic number.

85469731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85469731 is an equidigital number, since it uses as much as digits as its factorization.

85469731 is an evil number, because the sum of its binary digits is even.

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

The square root of 85469731 is about 9244.9840994996. The cubic root of 85469731 is about 440.4914120525.

The spelling of 85469731 in words is "eighty-five million, four hundred sixty-nine thousand, seven hundred thirty-one".