1299138393 has 8 divisors (see below), whose sum is σ = 1979639488. Its totient is φ = 742364784.

The previous prime is 1299138383. The next prime is 1299138431. The reversal of 1299138393 is 3938319921.

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

It is not a de Polignac number, because 1299138393 - 2⁴ = 1299138377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299138383) 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, 30931846 + ... + 30931887.

It is an arithmetic number, because the mean of its divisors is an integer number (247454936).

Almost surely, 2^1299138393 is an apocalyptic number.

It is an amenable number.

1299138393 is a deficient number, since it is larger than the sum of its proper divisors (680501095).

1299138393 is an equidigital number, since it uses as much as digits as its factorization.

1299138393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61863743.

The product of its digits is 314928, while the sum is 48.

The square root of 1299138393 is about 36043.5624349203. The cubic root of 1299138393 is about 1091.1517139402.

The spelling of 1299138393 in words is "one billion, two hundred ninety-nine million, one hundred thirty-eight thousand, three hundred ninety-three".