1479391117 has 4 divisors (see below), whose sum is σ = 1479470560. Its totient is φ = 1479311676.

The previous prime is 1479391099. The next prime is 1479391139. The reversal of 1479391117 is 7111939741.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7111939741 = 31 ⋅229417411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1479391117 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 (1479391157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4984 + ... + 54622.

It is an arithmetic number, because the mean of its divisors is an integer number (369867640).

Almost surely, 2^1479391117 is an apocalyptic number.

It is an amenable number.

1479391117 is a deficient number, since it is larger than the sum of its proper divisors (79443).

1479391117 is an equidigital number, since it uses as much as digits as its factorization.

1479391117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79442.

The product of its digits is 47628, while the sum is 43.

The square root of 1479391117 is about 38462.8537292802. The cubic root of 1479391117 is about 1139.4475411274.

The spelling of 1479391117 in words is "one billion, four hundred seventy-nine million, three hundred ninety-one thousand, one hundred seventeen".