1212973979 has 48 divisors (see below), whose sum is σ = 1497139200. Its totient is φ = 978921216.

The previous prime is 1212973973. The next prime is 1212973991. The reversal of 1212973979 is 9793792121.

It is a de Polignac number, because none of the positive numbers 2^k-1212973979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212973973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10734227 + ... + 10734339.

It is an arithmetic number, because the mean of its divisors is an integer number (31190400).

Almost surely, 2^1212973979 is an apocalyptic number.

1212973979 is a deficient number, since it is larger than the sum of its proper divisors (284165221).

1212973979 is a wasteful number, since it uses less digits than its factorization.

1212973979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 305 counting only the distinct ones).

The product of its digits is 428652, while the sum is 50.

The square root of 1212973979 is about 34827.7759697630. The cubic root of 1212973979 is about 1066.4745469202.

The spelling of 1212973979 in words is "one billion, two hundred twelve million, nine hundred seventy-three thousand, nine hundred seventy-nine".