1012909979 has 4 divisors (see below), whose sum is σ = 1024291080. Its totient is φ = 1001528880.

The previous prime is 1012909973. The next prime is 1012909991. The reversal of 1012909979 is 9799092101.

It is a happy number.

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 1012909979 - 2²⁴ = 996132763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012909973) 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, 5690417 + ... + 5690594.

It is an arithmetic number, because the mean of its divisors is an integer number (256072770).

Almost surely, 2^1012909979 is an apocalyptic number.

1012909979 is a deficient number, since it is larger than the sum of its proper divisors (11381101).

1012909979 is an equidigital number, since it uses as much as digits as its factorization.

1012909979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11381100.

The product of its (nonzero) digits is 91854, while the sum is 47.

The square root of 1012909979 is about 31826.2466998545. The cubic root of 1012909979 is about 1004.2849394028.

The spelling of 1012909979 in words is "one billion, twelve million, nine hundred nine thousand, nine hundred seventy-nine".