37998979 has 2 divisors, whose sum is σ = 37998980. Its totient is φ = 37998978.

The previous prime is 37998973. The next prime is 37999001. The reversal of 37998979 is 97989973.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37998979 - 2¹³ = 37990787 is a prime.

It is not a weakly prime, because it can be changed into another prime (37998973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18999489 + 18999490.

It is an arithmetic number, because the mean of its divisors is an integer number (18999490).

Almost surely, 2^37998979 is an apocalyptic number.

37998979 is a deficient number, since it is larger than the sum of its proper divisors (1).

37998979 is an equidigital number, since it uses as much as digits as its factorization.

37998979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7715736, while the sum is 61.

The square root of 37998979 is about 6164.3311883772. The cubic root of 37998979 is about 336.1945296206.

The spelling of 37998979 in words is "thirty-seven million, nine hundred ninety-eight thousand, nine hundred seventy-nine".