616412887 has 2 divisors, whose sum is σ = 616412888. Its totient is φ = 616412886.

The previous prime is 616412879. The next prime is 616412921. The reversal of 616412887 is 788214616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616412887 - 2³ = 616412879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616412827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308206443 + 308206444.

It is an arithmetic number, because the mean of its divisors is an integer number (308206444).

Almost surely, 2^616412887 is an apocalyptic number.

616412887 is a deficient number, since it is larger than the sum of its proper divisors (1).

616412887 is an equidigital number, since it uses as much as digits as its factorization.

616412887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 616412887 is about 24827.6637442994. The cubic root of 616412887 is about 851.0542337881.

The spelling of 616412887 in words is "six hundred sixteen million, four hundred twelve thousand, eight hundred eighty-seven".