1299747868 has 24 divisors (see below), whose sum is σ = 2386147680. Its totient is φ = 618623040.

The previous prime is 1299747863. The next prime is 1299747899. The reversal of 1299747868 is 8687479921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299747863) 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, 70671 + ... + 87142.

It is an arithmetic number, because the mean of its divisors is an integer number (99422820).

Almost surely, 2^1299747868 is an apocalyptic number.

It is an amenable number.

1299747868 is a deficient number, since it is larger than the sum of its proper divisors (1086399812).

1299747868 is a wasteful number, since it uses less digits than its factorization.

1299747868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157917 (or 157915 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 61.

The square root of 1299747868 is about 36052.0161433449. The cubic root of 1299747868 is about 1091.3223207888.

The spelling of 1299747868 in words is "one billion, two hundred ninety-nine million, seven hundred forty-seven thousand, eight hundred sixty-eight".