4040979 has 4 divisors (see below), whose sum is σ = 5387976. Its totient is φ = 2693984.

The previous prime is 4040963. The next prime is 4040989. The reversal of 4040979 is 9790404.

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 4040979 - 2⁴ = 4040963 is a prime.

It is a super-2 number, since 2×4040979² = 32659022556882, which contains 22 as substring.

It is a D-number.

4040979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4040989) 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, 673494 + ... + 673499.

It is an arithmetic number, because the mean of its divisors is an integer number (1346994).

Almost surely, 2^4040979 is an apocalyptic number.

4040979 is a deficient number, since it is larger than the sum of its proper divisors (1346997).

4040979 is a wasteful number, since it uses less digits than its factorization.

4040979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346996.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 4040979 is about 2010.2186448245. The cubic root of 4040979 is about 159.2803487198.

The spelling of 4040979 in words is "four million, forty thousand, nine hundred seventy-nine".