616724291 has 2 divisors, whose sum is σ = 616724292. Its totient is φ = 616724290.

The previous prime is 616724267. The next prime is 616724299. The reversal of 616724291 is 192427616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616724291 - 2¹⁰ = 616723267 is a prime.

It is a super-2 number, since 2×616724291² = 760697702218905362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (616724299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308362145 + 308362146.

It is an arithmetic number, because the mean of its divisors is an integer number (308362146).

Almost surely, 2^616724291 is an apocalyptic number.

616724291 is a deficient number, since it is larger than the sum of its proper divisors (1).

616724291 is an equidigital number, since it uses as much as digits as its factorization.

616724291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 616724291 is about 24833.9342634227. The cubic root of 616724291 is about 851.1975236090.

The spelling of 616724291 in words is "six hundred sixteen million, seven hundred twenty-four thousand, two hundred ninety-one".