616969841 has 2 divisors, whose sum is σ = 616969842. Its totient is φ = 616969840.

The previous prime is 616969823. The next prime is 616969853. The reversal of 616969841 is 148969616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610287616 + 6682225 = 24704^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 616969841 - 2⁶ = 616969777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616969841.

It is not a weakly prime, because it can be changed into another prime (616969741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308484920 + 308484921.

It is an arithmetic number, because the mean of its divisors is an integer number (308484921).

Almost surely, 2^616969841 is an apocalyptic number.

It is an amenable number.

616969841 is a deficient number, since it is larger than the sum of its proper divisors (1).

616969841 is an equidigital number, since it uses as much as digits as its factorization.

616969841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 616969841 is about 24838.8776115186. The cubic root of 616969841 is about 851.3104772804.

The spelling of 616969841 in words is "six hundred sixteen million, nine hundred sixty-nine thousand, eight hundred forty-one".