616988839 has 2 divisors, whose sum is σ = 616988840. Its totient is φ = 616988838.

The previous prime is 616988819. The next prime is 616988861. The reversal of 616988839 is 938889616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616988839 - 2⁵ = 616988807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616988819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308494419 + 308494420.

It is an arithmetic number, because the mean of its divisors is an integer number (308494420).

Almost surely, 2^616988839 is an apocalyptic number.

616988839 is a deficient number, since it is larger than the sum of its proper divisors (1).

616988839 is an equidigital number, since it uses as much as digits as its factorization.

616988839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 58.

The square root of 616988839 is about 24839.2600332619. The cubic root of 616988839 is about 851.3192151631.

The spelling of 616988839 in words is "six hundred sixteen million, nine hundred eighty-eight thousand, eight hundred thirty-nine".