616786057 has 2 divisors, whose sum is σ = 616786058. Its totient is φ = 616786056.

The previous prime is 616786039. The next prime is 616786087. The reversal of 616786057 is 750687616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400960576 + 215825481 = 20024^2 + 14691^2 .

It is a cyclic number.

It is not a de Polignac number, because 616786057 - 2¹⁹ = 616261769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616785998 and 616786016.

It is not a weakly prime, because it can be changed into another prime (616786087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308393028 + 308393029.

It is an arithmetic number, because the mean of its divisors is an integer number (308393029).

Almost surely, 2^616786057 is an apocalyptic number.

It is an amenable number.

616786057 is a deficient number, since it is larger than the sum of its proper divisors (1).

616786057 is an equidigital number, since it uses as much as digits as its factorization.

616786057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 616786057 is about 24835.1778129330. The cubic root of 616786057 is about 851.2259389598.

The spelling of 616786057 in words is "six hundred sixteen million, seven hundred eighty-six thousand, fifty-seven".