1617952979 has 2 divisors, whose sum is σ = 1617952980. Its totient is φ = 1617952978.

The previous prime is 1617952967. The next prime is 1617952993. The reversal of 1617952979 is 9792597161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617952979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1617952939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808976489 + 808976490.

It is an arithmetic number, because the mean of its divisors is an integer number (808976490).

Almost surely, 2^1617952979 is an apocalyptic number.

1617952979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617952979 is an equidigital number, since it uses as much as digits as its factorization.

1617952979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 56.

The square root of 1617952979 is about 40223.7862340183. The cubic root of 1617952979 is about 1173.9654038293.

The spelling of 1617952979 in words is "one billion, six hundred seventeen million, nine hundred fifty-two thousand, nine hundred seventy-nine".