85257637 has 2 divisors, whose sum is σ = 85257638. Its totient is φ = 85257636.

The previous prime is 85257631. The next prime is 85257661. The reversal of 85257637 is 73675258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82700836 + 2556801 = 9094^2 + 1599^2 .

It is a cyclic number.

It is not a de Polignac number, because 85257637 - 2¹¹ = 85255589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85257593 and 85257602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85257631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42628818 + 42628819.

It is an arithmetic number, because the mean of its divisors is an integer number (42628819).

Almost surely, 2^85257637 is an apocalyptic number.

It is an amenable number.

85257637 is a deficient number, since it is larger than the sum of its proper divisors (1).

85257637 is an equidigital number, since it uses as much as digits as its factorization.

85257637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 43.

The square root of 85257637 is about 9233.5062137847. The cubic root of 85257637 is about 440.1267489528.

The spelling of 85257637 in words is "eighty-five million, two hundred fifty-seven thousand, six hundred thirty-seven".