1879491317 has 4 divisors (see below), whose sum is σ = 2050354176. Its totient is φ = 1708628460.

The previous prime is 1879491307. The next prime is 1879491323. The reversal of 1879491317 is 7131949781.

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: 7131949781 = 11 ⋅648359071.

It is a de Polignac number, because none of the positive numbers 2^k-1879491317 is a prime.

It is a super-2 number, since 2×1879491317² = 7064975221356788978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1879491307) 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, 85431413 + ... + 85431434.

It is an arithmetic number, because the mean of its divisors is an integer number (512588544).

Almost surely, 2^1879491317 is an apocalyptic number.

It is an amenable number.

1879491317 is a deficient number, since it is larger than the sum of its proper divisors (170862859).

1879491317 is a wasteful number, since it uses less digits than its factorization.

1879491317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170862858.

The product of its digits is 381024, while the sum is 50.

The square root of 1879491317 is about 43353.1004312264. The cubic root of 1879491317 is about 1234.0898334169.

The spelling of 1879491317 in words is "one billion, eight hundred seventy-nine million, four hundred ninety-one thousand, three hundred seventeen".