616840747 has 2 divisors, whose sum is σ = 616840748. Its totient is φ = 616840746.

The previous prime is 616840661. The next prime is 616840771. The reversal of 616840747 is 747048616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616840747 - 2²³ = 608452139 is a prime.

It is not a weakly prime, because it can be changed into another prime (616840787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308420373 + 308420374.

It is an arithmetic number, because the mean of its divisors is an integer number (308420374).

Almost surely, 2^616840747 is an apocalyptic number.

616840747 is a deficient number, since it is larger than the sum of its proper divisors (1).

616840747 is an equidigital number, since it uses as much as digits as its factorization.

616840747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 616840747 is about 24836.2788476857. The cubic root of 616840747 is about 851.2510974245.

The spelling of 616840747 in words is "six hundred sixteen million, eight hundred forty thousand, seven hundred forty-seven".