616521089 has 2 divisors, whose sum is σ = 616521090. Its totient is φ = 616521088.

The previous prime is 616521079. The next prime is 616521127. The reversal of 616521089 is 980125616.

It is an a-pointer prime, because the next prime (616521127) can be obtained adding 616521089 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615040000 + 1481089 = 24800^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 616521089 - 2²⁰ = 615472513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (616521079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308260544 + 308260545.

It is an arithmetic number, because the mean of its divisors is an integer number (308260545).

Almost surely, 2^616521089 is an apocalyptic number.

It is an amenable number.

616521089 is a deficient number, since it is larger than the sum of its proper divisors (1).

616521089 is an equidigital number, since it uses as much as digits as its factorization.

616521089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 616521089 is about 24829.8427099327. The cubic root of 616521089 is about 851.1040274597.

The spelling of 616521089 in words is "six hundred sixteen million, five hundred twenty-one thousand, eighty-nine".