616972511 has 2 divisors, whose sum is σ = 616972512. Its totient is φ = 616972510.

The previous prime is 616972481. The next prime is 616972519. The reversal of 616972511 is 115279616.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616972511 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616972519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308486255 + 308486256.

It is an arithmetic number, because the mean of its divisors is an integer number (308486256).

Almost surely, 2^616972511 is an apocalyptic number.

616972511 is a deficient number, since it is larger than the sum of its proper divisors (1).

616972511 is an equidigital number, since it uses as much as digits as its factorization.

616972511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 616972511 is about 24838.9313578503. The cubic root of 616972511 is about 851.3117053229.

The spelling of 616972511 in words is "six hundred sixteen million, nine hundred seventy-two thousand, five hundred eleven".