1299979297 has 8 divisors (see below), whose sum is σ = 1427895360. Its totient is φ = 1178012880.

The previous prime is 1299979271. The next prime is 1299979309. The reversal of 1299979297 is 7929799921.

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 1299979297 - 2¹⁹ = 1299455009 is a prime.

It is a super-2 number, since 2×1299979297² = 3379892345257228418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299979237) 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, 1486954 + ... + 1487827.

It is an arithmetic number, because the mean of its divisors is an integer number (178486920).

Almost surely, 2^1299979297 is an apocalyptic number.

It is an amenable number.

1299979297 is a deficient number, since it is larger than the sum of its proper divisors (127916063).

1299979297 is a wasteful number, since it uses less digits than its factorization.

1299979297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974823.

The product of its digits is 11573604, while the sum is 64.

The square root of 1299979297 is about 36055.2256545428. The cubic root of 1299979297 is about 1091.3870894132.

The spelling of 1299979297 in words is "one billion, two hundred ninety-nine million, nine hundred seventy-nine thousand, two hundred ninety-seven".