616696637 has 2 divisors, whose sum is σ = 616696638. Its totient is φ = 616696636.

The previous prime is 616696589. The next prime is 616696643. The reversal of 616696637 is 736696616.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 615585721 + 1110916 = 24811^2 + 1054^2 .

It is a cyclic number.

It is not a de Polignac number, because 616696637 - 2¹⁸ = 616434493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616696667) 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, 308348318 + 308348319.

It is an arithmetic number, because the mean of its divisors is an integer number (308348319).

Almost surely, 2^616696637 is an apocalyptic number.

It is an amenable number.

616696637 is a deficient number, since it is larger than the sum of its proper divisors (1).

616696637 is an equidigital number, since it uses as much as digits as its factorization.

616696637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 50.

The square root of 616696637 is about 24833.3774787080. The cubic root of 616696637 is about 851.1848008151.

The spelling of 616696637 in words is "six hundred sixteen million, six hundred ninety-six thousand, six hundred thirty-seven".