85179631 has 2 divisors, whose sum is σ = 85179632. Its totient is φ = 85179630.

The previous prime is 85179581. The next prime is 85179637. The reversal of 85179631 is 13697158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85179631 - 2¹³ = 85171439 is a prime.

It is a super-2 number, since 2×85179631² = 14511139074592322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85179637) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42589815 + 42589816.

It is an arithmetic number, because the mean of its divisors is an integer number (42589816).

Almost surely, 2^85179631 is an apocalyptic number.

85179631 is a deficient number, since it is larger than the sum of its proper divisors (1).

85179631 is an equidigital number, since it uses as much as digits as its factorization.

85179631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 85179631 is about 9229.2811746094. The cubic root of 85179631 is about 439.9924774885.

The spelling of 85179631 in words is "eighty-five million, one hundred seventy-nine thousand, six hundred thirty-one".