616210961 has 2 divisors, whose sum is σ = 616210962. Its totient is φ = 616210960.

The previous prime is 616210921. The next prime is 616211023. The reversal of 616210961 is 169012616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381967936 + 234243025 = 19544^2 + 15305^2 .

It is a cyclic number.

It is not a de Polignac number, because 616210961 - 2⁶ = 616210897 is a prime.

It is not a weakly prime, because it can be changed into another prime (616210921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308105480 + 308105481.

It is an arithmetic number, because the mean of its divisors is an integer number (308105481).

Almost surely, 2^616210961 is an apocalyptic number.

It is an amenable number.

616210961 is a deficient number, since it is larger than the sum of its proper divisors (1).

616210961 is an equidigital number, since it uses as much as digits as its factorization.

616210961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 616210961 is about 24823.5968586343. The cubic root of 616210961 is about 850.9612935153.

The spelling of 616210961 in words is "six hundred sixteen million, two hundred ten thousand, nine hundred sixty-one".