1339131493 has 4 divisors (see below), whose sum is σ = 1530436000. Its totient is φ = 1147826988.

The previous prime is 1339131481. The next prime is 1339131503. The reversal of 1339131493 is 3941319331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3941319331 = 2879 ⋅1368989.

It is a de Polignac number, because none of the positive numbers 2^k-1339131493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339131403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95652243 + ... + 95652256.

It is an arithmetic number, because the mean of its divisors is an integer number (382609000).

Almost surely, 2^1339131493 is an apocalyptic number.

It is an amenable number.

1339131493 is a deficient number, since it is larger than the sum of its proper divisors (191304507).

1339131493 is an equidigital number, since it uses as much as digits as its factorization.

1339131493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191304506.

The product of its digits is 26244, while the sum is 37.

The square root of 1339131493 is about 36594.1456110127. The cubic root of 1339131493 is about 1102.2355343532.

The spelling of 1339131493 in words is "one billion, three hundred thirty-nine million, one hundred thirty-one thousand, four hundred ninety-three".