4000979 has 2 divisors, whose sum is σ = 4000980. Its totient is φ = 4000978.

The previous prime is 4000957. The next prime is 4000987. The reversal of 4000979 is 9790004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000979 - 2⁸ = 4000723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4000939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000489 + 2000490.

It is an arithmetic number, because the mean of its divisors is an integer number (2000490).

Almost surely, 2^4000979 is an apocalyptic number.

4000979 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000979 is an equidigital number, since it uses as much as digits as its factorization.

4000979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 4000979 is about 2000.2447350262. The cubic root of 4000979 is about 158.7530546873.

The spelling of 4000979 in words is "four million, nine hundred seventy-nine", and thus it is an aban number.