4391979 has 8 divisors (see below), whose sum is σ = 5874240. Its totient is φ = 2918856.

The previous prime is 4391969. The next prime is 4391993. The reversal of 4391979 is 9791934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4391979 - 2⁷ = 4391851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4391979.

It is not an unprimeable number, because it can be changed into a prime (4391909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069 + ... + 3150.

It is an arithmetic number, because the mean of its divisors is an integer number (734280).

Almost surely, 2^4391979 is an apocalyptic number.

4391979 is a deficient number, since it is larger than the sum of its proper divisors (1482261).

4391979 is a wasteful number, since it uses less digits than its factorization.

4391979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569.

The product of its digits is 61236, while the sum is 42.

The square root of 4391979 is about 2095.7048933473. The cubic root of 4391979 is about 163.7646211912.

The spelling of 4391979 in words is "four million, three hundred ninety-one thousand, nine hundred seventy-nine".