616707631 has 2 divisors, whose sum is σ = 616707632. Its totient is φ = 616707630.

The previous prime is 616707617. The next prime is 616707647. The reversal of 616707631 is 136707616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616707631 - 2⁵ = 616707599 is a prime.

It is a super-2 number, since 2×616707631² = 760656604267264322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616705631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308353815 + 308353816.

It is an arithmetic number, because the mean of its divisors is an integer number (308353816).

Almost surely, 2^616707631 is an apocalyptic number.

616707631 is a deficient number, since it is larger than the sum of its proper divisors (1).

616707631 is an equidigital number, since it uses as much as digits as its factorization.

616707631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 616707631 is about 24833.5988330326. The cubic root of 616707631 is about 851.1898588774.

The spelling of 616707631 in words is "six hundred sixteen million, seven hundred seven thousand, six hundred thirty-one".