1299875979 has 8 divisors (see below), whose sum is σ = 1733548752. Its totient is φ = 866393600.

The previous prime is 1299875963. The next prime is 1299875989. The reversal of 1299875979 is 9795789921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1299875979 - 2⁴ = 1299875963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299875909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30822 + ... + 59579.

It is an arithmetic number, because the mean of its divisors is an integer number (216693594).

Almost surely, 2^1299875979 is an apocalyptic number.

1299875979 is a deficient number, since it is larger than the sum of its proper divisors (433672773).

1299875979 is an equidigital number, since it uses as much as digits as its factorization.

1299875979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95197.

The product of its digits is 25719120, while the sum is 66.

The square root of 1299875979 is about 36053.7928517930. The cubic root of 1299875979 is about 1091.3581753838.

The spelling of 1299875979 in words is "one billion, two hundred ninety-nine million, eight hundred seventy-five thousand, nine hundred seventy-nine".