1299131018 has 8 divisors (see below), whose sum is σ = 1985464548. Its totient is φ = 637309504.

The previous prime is 1299130993. The next prime is 1299131059. The reversal of 1299131018 is 8101319921.

It can be written as a sum of positive squares in 2 ways, for example, as 1293337369 + 5793649 = 35963^2 + 2407^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6127871 + ... + 6128082.

Almost surely, 2^1299131018 is an apocalyptic number.

1299131018 is a deficient number, since it is larger than the sum of its proper divisors (686333530).

1299131018 is a wasteful number, since it uses less digits than its factorization.

1299131018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12256008.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 1299131018 is about 36043.4601280177. The cubic root of 1299131018 is about 1091.1496491720.

The spelling of 1299131018 in words is "one billion, two hundred ninety-nine million, one hundred thirty-one thousand, eighteen".