1299979295 has 4 divisors (see below), whose sum is σ = 1559975160. Its totient is φ = 1039983432.

The previous prime is 1299979271. The next prime is 1299979309. The reversal of 1299979295 is 5929799921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5929799921 = 6421 ⋅923501.

It is a cyclic number.

It is not a de Polignac number, because 1299979295 - 2⁶ = 1299979231 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129997925 + ... + 129997934.

It is an arithmetic number, because the mean of its divisors is an integer number (389993790).

Almost surely, 2^1299979295 is an apocalyptic number.

1299979295 is a deficient number, since it is larger than the sum of its proper divisors (259995865).

1299979295 is an equidigital number, since it uses as much as digits as its factorization.

1299979295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259995864.

The product of its digits is 8266860, while the sum is 62.

The square root of 1299979295 is about 36055.2256268076. The cubic root of 1299979295 is about 1091.3870888535.

The spelling of 1299979295 in words is "one billion, two hundred ninety-nine million, nine hundred seventy-nine thousand, two hundred ninety-five".