1979988937 has 2 divisors, whose sum is σ = 1979988938. Its totient is φ = 1979988936.

The previous prime is 1979988931. The next prime is 1979988961. The reversal of 1979988937 is 7398899791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1874803401 + 105185536 = 43299^2 + 10256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979988937 - 2²³ = 1971600329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1979988931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989994468 + 989994469.

It is an arithmetic number, because the mean of its divisors is an integer number (989994469).

Almost surely, 2^1979988937 is an apocalyptic number.

It is an amenable number.

1979988937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979988937 is an equidigital number, since it uses as much as digits as its factorization.

1979988937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61725888, while the sum is 70.

The square root of 1979988937 is about 44497.0666111824. The cubic root of 1979988937 is about 1255.7048969377.

The spelling of 1979988937 in words is "one billion, nine hundred seventy-nine million, nine hundred eighty-eight thousand, nine hundred thirty-seven".