3109979 has 2 divisors, whose sum is σ = 3109980. Its totient is φ = 3109978.

The previous prime is 3109969. The next prime is 3109999. The reversal of 3109979 is 9799013.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3109979 is a prime.

It is not a weakly prime, because it can be changed into another prime (3109969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1554989 + 1554990.

It is an arithmetic number, because the mean of its divisors is an integer number (1554990).

Almost surely, 2^3109979 is an apocalyptic number.

3109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

3109979 is an equidigital number, since it uses as much as digits as its factorization.

3109979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 3109979 is about 1763.5132548410. The cubic root of 3109979 is about 145.9662616731.

The spelling of 3109979 in words is "three million, one hundred nine thousand, nine hundred seventy-nine".