1299168657 has 12 divisors (see below), whose sum is σ = 1877650320. Its totient is φ = 865617048.

The previous prime is 1299168653. The next prime is 1299168683. The reversal of 1299168657 is 7568619921.

It is not a de Polignac number, because 1299168657 - 2² = 1299168653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299168653) 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 11 ways as a sum of consecutive naturals, for example, 24307 + ... + 56472.

It is an arithmetic number, because the mean of its divisors is an integer number (156470860).

Almost surely, 2^1299168657 is an apocalyptic number.

It is an amenable number.

1299168657 is a deficient number, since it is larger than the sum of its proper divisors (578481663).

1299168657 is a wasteful number, since it uses less digits than its factorization.

1299168657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82572 (or 82569 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1299168657 is about 36043.9822577917. The cubic root of 1299168657 is about 1091.1601868274.

The spelling of 1299168657 in words is "one billion, two hundred ninety-nine million, one hundred sixty-eight thousand, six hundred fifty-seven".