1042009979 has 2 divisors, whose sum is σ = 1042009980. Its totient is φ = 1042009978.

The previous prime is 1042009931. The next prime is 1042009993. The reversal of 1042009979 is 9799002401.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1042009979 - 2²⁰ = 1040961403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042009909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521004989 + 521004990.

It is an arithmetic number, because the mean of its divisors is an integer number (521004990).

Almost surely, 2^1042009979 is an apocalyptic number.

1042009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042009979 is an equidigital number, since it uses as much as digits as its factorization.

1042009979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1042009979 is about 32280.1793520420. The cubic root of 1042009979 is about 1013.8116854277.

The spelling of 1042009979 in words is "one billion, forty-two million, nine thousand, nine hundred seventy-nine".