1299172664 has 32 divisors (see below), whose sum is σ = 2546532000. Its totient is φ = 620201472.

The previous prime is 1299172663. The next prime is 1299172669. The reversal of 1299172664 is 4662719921.

It is a super-2 number, since 2×1299172664² = 3375699221769713792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299172661) 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, 98492 + ... + 110900.

It is an arithmetic number, because the mean of its divisors is an integer number (79579125).

Almost surely, 2^1299172664 is an apocalyptic number.

It is an amenable number.

1299172664 is a deficient number, since it is larger than the sum of its proper divisors (1247359336).

1299172664 is a wasteful number, since it uses less digits than its factorization.

1299172664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13007 (or 13003 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 1299172664 is about 36044.0378426169. The cubic root of 1299172664 is about 1091.1613086408.

The spelling of 1299172664 in words is "one billion, two hundred ninety-nine million, one hundred seventy-two thousand, six hundred sixty-four".