616505297 has 2 divisors, whose sum is σ = 616505298. Its totient is φ = 616505296.

The previous prime is 616505291. The next prime is 616505303. The reversal of 616505297 is 792505616.

It is a balanced prime because it is at equal distance from previous prime (616505291) and next prime (616505303).

It can be written as a sum of positive squares in only one way, i.e., 572932096 + 43573201 = 23936^2 + 6601^2 .

It is a cyclic number.

It is not a de Polignac number, because 616505297 - 2¹² = 616501201 is a prime.

It is not a weakly prime, because it can be changed into another prime (616505291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308252648 + 308252649.

It is an arithmetic number, because the mean of its divisors is an integer number (308252649).

Almost surely, 2^616505297 is an apocalyptic number.

It is an amenable number.

616505297 is a deficient number, since it is larger than the sum of its proper divisors (1).

616505297 is an equidigital number, since it uses as much as digits as its factorization.

616505297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 616505297 is about 24829.5247034654. The cubic root of 616505297 is about 851.0967604741.

The spelling of 616505297 in words is "six hundred sixteen million, five hundred five thousand, two hundred ninety-seven".