1299985079 has 8 divisors (see below), whose sum is σ = 1346347008. Its totient is φ = 1254402520.

The previous prime is 1299985033. The next prime is 1299985097. The reversal of 1299985079 is 9705899921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299985079 is a prime.

It is a super-2 number, since 2×1299985079² = 3379922411245272482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299985979) 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, 191447 + ... + 198120.

It is an arithmetic number, because the mean of its divisors is an integer number (168293376).

Almost surely, 2^1299985079 is an apocalyptic number.

1299985079 is a deficient number, since it is larger than the sum of its proper divisors (46361929).

1299985079 is an equidigital number, since it uses as much as digits as its factorization.

1299985079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389685.

The product of its (nonzero) digits is 3674160, while the sum is 59.

The square root of 1299985079 is about 36055.3058370055. The cubic root of 1299985079 is about 1091.3887074879.

The spelling of 1299985079 in words is "one billion, two hundred ninety-nine million, nine hundred eighty-five thousand, seventy-nine".