655090637 has 2 divisors, whose sum is σ = 655090638. Its totient is φ = 655090636.

The previous prime is 655090633. The next prime is 655090649. The reversal of 655090637 is 736090556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486246601 + 168844036 = 22051^2 + 12994^2 .

It is a cyclic number.

It is not a de Polignac number, because 655090637 - 2² = 655090633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655090594 and 655090603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655090633) 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, 327545318 + 327545319.

It is an arithmetic number, because the mean of its divisors is an integer number (327545319).

Almost surely, 2^655090637 is an apocalyptic number.

It is an amenable number.

655090637 is a deficient number, since it is larger than the sum of its proper divisors (1).

655090637 is an equidigital number, since it uses as much as digits as its factorization.

655090637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 655090637 is about 25594.7384632076. The cubic root of 655090637 is about 868.4946164984.

The spelling of 655090637 in words is "six hundred fifty-five million, ninety thousand, six hundred thirty-seven".