616476989 has 2 divisors, whose sum is σ = 616476990. Its totient is φ = 616476988.

The previous prime is 616476947. The next prime is 616477003. The reversal of 616476989 is 989674616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 519612025 + 96864964 = 22795^2 + 9842^2 .

It is a cyclic number.

It is not a de Polignac number, because 616476989 - 2²⁰ = 615428413 is a prime.

It is a super-2 number, since 2×616476989² = 760087755933012242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616476089) 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, 308238494 + 308238495.

It is an arithmetic number, because the mean of its divisors is an integer number (308238495).

Almost surely, 2^616476989 is an apocalyptic number.

It is an amenable number.

616476989 is a deficient number, since it is larger than the sum of its proper divisors (1).

616476989 is an equidigital number, since it uses as much as digits as its factorization.

616476989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The square root of 616476989 is about 24828.9546497632. The cubic root of 616476989 is about 851.0837337054.

The spelling of 616476989 in words is "six hundred sixteen million, four hundred seventy-six thousand, nine hundred eighty-nine".