1229912979 has 16 divisors (see below), whose sum is σ = 1674522912. Its totient is φ = 802787328.

The previous prime is 1229912977. The next prime is 1229913023. The reversal of 1229912979 is 9792199221.

It is not a de Polignac number, because 1229912979 - 2¹ = 1229912977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1229912977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9507 + ... + 50499.

It is an arithmetic number, because the mean of its divisors is an integer number (104657682).

Almost surely, 2^1229912979 is an apocalyptic number.

1229912979 is a deficient number, since it is larger than the sum of its proper divisors (444609933).

1229912979 is a wasteful number, since it uses less digits than its factorization.

1229912979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41206.

The product of its digits is 367416, while the sum is 51.

The square root of 1229912979 is about 35070.1151837287. The cubic root of 1229912979 is about 1071.4160013738.

The spelling of 1229912979 in words is "one billion, two hundred twenty-nine million, nine hundred twelve thousand, nine hundred seventy-nine".