85180637 has 2 divisors, whose sum is σ = 85180638. Its totient is φ = 85180636.

The previous prime is 85180631. The next prime is 85180639. The reversal of 85180637 is 73608158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48080356 + 37100281 = 6934^2 + 6091^2 .

It is a cyclic number.

It is not a de Polignac number, because 85180637 - 2²² = 80986333 is a prime.

Together with 85180639, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85180637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85180631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42590318 + 42590319.

It is an arithmetic number, because the mean of its divisors is an integer number (42590319).

Almost surely, 2^85180637 is an apocalyptic number.

It is an amenable number.

85180637 is a deficient number, since it is larger than the sum of its proper divisors (1).

85180637 is an equidigital number, since it uses as much as digits as its factorization.

85180637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 85180637 is about 9229.3356749010. The cubic root of 85180637 is about 439.9942096345.

The spelling of 85180637 in words is "eighty-five million, one hundred eighty thousand, six hundred thirty-seven".