38989979 has 4 divisors (see below), whose sum is σ = 44559984. Its totient is φ = 33419976.

The previous prime is 38989967. The next prime is 38989981. The reversal of 38989979 is 97998983.

38989979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97998983 = 257 ⋅381319.

It is a cyclic number.

It is not a de Polignac number, because 38989979 - 2⁴ = 38989963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38980979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2784992 + ... + 2785005.

It is an arithmetic number, because the mean of its divisors is an integer number (11139996).

Almost surely, 2^38989979 is an apocalyptic number.

38989979 is a deficient number, since it is larger than the sum of its proper divisors (5570005).

38989979 is an equidigital number, since it uses as much as digits as its factorization.

38989979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570004.

The product of its digits is 8817984, while the sum is 62.

The square root of 38989979 is about 6244.1956247382. The cubic root of 38989979 is about 339.0920962322.

The spelling of 38989979 in words is "thirty-eight million, nine hundred eighty-nine thousand, nine hundred seventy-nine".