438919979 has 4 divisors (see below), whose sum is σ = 453078720. Its totient is φ = 424761240.

The previous prime is 438919961. The next prime is 438920023. The reversal of 438919979 is 979919834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 438919979 - 2¹⁶ = 438854443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438919919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7079324 + ... + 7079385.

It is an arithmetic number, because the mean of its divisors is an integer number (113269680).

Almost surely, 2^438919979 is an apocalyptic number.

438919979 is a deficient number, since it is larger than the sum of its proper divisors (14158741).

438919979 is a wasteful number, since it uses less digits than its factorization.

438919979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14158740.

The product of its digits is 4408992, while the sum is 59.

The square root of 438919979 is about 20950.4171557513. The cubic root of 438919979 is about 759.9676688693.

The spelling of 438919979 in words is "four hundred thirty-eight million, nine hundred nineteen thousand, nine hundred seventy-nine".