85710431 has 2 divisors, whose sum is σ = 85710432. Its totient is φ = 85710430.

The previous prime is 85710371. The next prime is 85710437. The reversal of 85710431 is 13401758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85710431 - 2⁶ = 85710367 is a prime.

It is a super-2 number, since 2×85710431² = 14692555964411522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85710394 and 85710403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85710437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42855215 + 42855216.

It is an arithmetic number, because the mean of its divisors is an integer number (42855216).

Almost surely, 2^85710431 is an apocalyptic number.

85710431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85710431 is an equidigital number, since it uses as much as digits as its factorization.

85710431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 85710431 is about 9257.9928170203. The cubic root of 85710431 is about 440.9045287064.

The spelling of 85710431 in words is "eighty-five million, seven hundred ten thousand, four hundred thirty-one".