85680631 has 2 divisors, whose sum is σ = 85680632. Its totient is φ = 85680630.

The previous prime is 85680593. The next prime is 85680643. The reversal of 85680631 is 13608658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85680631 - 2¹⁹ = 85156343 is a prime.

It is a super-2 number, since 2×85680631² = 14682341057116322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85680691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42840315 + 42840316.

It is an arithmetic number, because the mean of its divisors is an integer number (42840316).

Almost surely, 2^85680631 is an apocalyptic number.

85680631 is a deficient number, since it is larger than the sum of its proper divisors (1).

85680631 is an equidigital number, since it uses as much as digits as its factorization.

85680631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 85680631 is about 9256.3832569746. The cubic root of 85680631 is about 440.8534245493.

The spelling of 85680631 in words is "eighty-five million, six hundred eighty thousand, six hundred thirty-one".