619616939 has 2 divisors, whose sum is σ = 619616940. Its totient is φ = 619616938.

The previous prime is 619616909. The next prime is 619616951. The reversal of 619616939 is 939616916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 619616939 - 2²⁴ = 602839723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (619616909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309808469 + 309808470.

It is an arithmetic number, because the mean of its divisors is an integer number (309808470).

Almost surely, 2^619616939 is an apocalyptic number.

619616939 is a deficient number, since it is larger than the sum of its proper divisors (1).

619616939 is an equidigital number, since it uses as much as digits as its factorization.

619616939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472392, while the sum is 50.

The square root of 619616939 is about 24892.1059575119. The cubic root of 619616939 is about 852.5262509439.

The spelling of 619616939 in words is "six hundred nineteen million, six hundred sixteen thousand, nine hundred thirty-nine".