1299839697 has 32 divisors (see below), whose sum is σ = 2089032960. Its totient is φ = 794033280.

The previous prime is 1299839683. The next prime is 1299839699. The reversal of 1299839697 is 7969389921.

It is a happy number.

It is not a de Polignac number, because 1299839697 - 2¹² = 1299835601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299839699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34572 + ... + 61602.

It is an arithmetic number, because the mean of its divisors is an integer number (65282280).

Almost surely, 2^1299839697 is an apocalyptic number.

It is an amenable number.

1299839697 is a deficient number, since it is larger than the sum of its proper divisors (789193263).

1299839697 is a wasteful number, since it uses less digits than its factorization.

1299839697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27190 (or 27184 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 1299839697 is about 36053.2896834672. The cubic root of 1299839697 is about 1091.3480213316.

The spelling of 1299839697 in words is "one billion, two hundred ninety-nine million, eight hundred thirty-nine thousand, six hundred ninety-seven".