801616979 has 2 divisors, whose sum is σ = 801616980. Its totient is φ = 801616978.

The previous prime is 801616969. The next prime is 801616993. The reversal of 801616979 is 979616108.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801616979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (801616939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400808489 + 400808490.

It is an arithmetic number, because the mean of its divisors is an integer number (400808490).

Almost surely, 2^801616979 is an apocalyptic number.

801616979 is a deficient number, since it is larger than the sum of its proper divisors (1).

801616979 is an equidigital number, since it uses as much as digits as its factorization.

801616979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 801616979 is about 28312.8412385617. The cubic root of 801616979 is about 928.9427917789.

The spelling of 801616979 in words is "eight hundred one million, six hundred sixteen thousand, nine hundred seventy-nine".