8438979 has 4 divisors (see below), whose sum is σ = 11251976. Its totient is φ = 5625984.

The previous prime is 8438977. The next prime is 8438981. The reversal of 8438979 is 9798348.

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

It is an interprime number because it is at equal distance from previous prime (8438977) and next prime (8438981).

It is not a de Polignac number, because 8438979 - 2¹ = 8438977 is a prime.

It is a Duffinian number.

8438979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8438977) 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, 1406494 + ... + 1406499.

It is an arithmetic number, because the mean of its divisors is an integer number (2812994).

Almost surely, 2^8438979 is an apocalyptic number.

8438979 is a deficient number, since it is larger than the sum of its proper divisors (2812997).

8438979 is a wasteful number, since it uses less digits than its factorization.

8438979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812996.

The product of its digits is 435456, while the sum is 48.

The square root of 8438979 is about 2904.9920826054. The cubic root of 8438979 is about 203.5932157309.

The spelling of 8438979 in words is "eight million, four hundred thirty-eight thousand, nine hundred seventy-nine".