1979335939 has 6 divisors (see below), whose sum is σ = 2302492884. Its totient is φ = 1696573620.

The previous prime is 1979335931. The next prime is 1979335987. The reversal of 1979335939 is 9395339791.

It is not a de Polignac number, because 1979335939 - 2³ = 1979335931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979335931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20197257 + ... + 20197354.

It is an arithmetic number, because the mean of its divisors is an integer number (383748814).

Almost surely, 2^1979335939 is an apocalyptic number.

1979335939 is a deficient number, since it is larger than the sum of its proper divisors (323156945).

1979335939 is an equidigital number, since it uses as much as digits as its factorization.

1979335939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40394625 (or 40394618 counting only the distinct ones).

The product of its digits is 6200145, while the sum is 58.

The square root of 1979335939 is about 44489.7284662426. The cubic root of 1979335939 is about 1255.5668384315.

The spelling of 1979335939 in words is "one billion, nine hundred seventy-nine million, three hundred thirty-five thousand, nine hundred thirty-nine".