613438979 has 2 divisors, whose sum is σ = 613438980. Its totient is φ = 613438978.

The previous prime is 613438963. The next prime is 613439011. The reversal of 613438979 is 979834316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613438979 - 2⁴ = 613438963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (613438909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306719489 + 306719490.

It is an arithmetic number, because the mean of its divisors is an integer number (306719490).

Almost surely, 2^613438979 is an apocalyptic number.

613438979 is a deficient number, since it is larger than the sum of its proper divisors (1).

613438979 is an equidigital number, since it uses as much as digits as its factorization.

613438979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 613438979 is about 24767.7003171469. The cubic root of 613438979 is about 849.6833787297.

The spelling of 613438979 in words is "six hundred thirteen million, four hundred thirty-eight thousand, nine hundred seventy-nine".