12913919 has 4 divisors (see below), whose sum is σ = 13090896. Its totient is φ = 12736944.

The previous prime is 12913913. The next prime is 12913921. The reversal of 12913919 is 91931921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91931921 = 8171 ⋅11251.

It is a cyclic number.

It is not a de Polignac number, because 12913919 - 2¹⁶ = 12848383 is a prime.

It is a super-2 number, since 2×12913919² = 333538607877122, 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 (12913913) 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, 88379 + ... + 88524.

It is an arithmetic number, because the mean of its divisors is an integer number (3272724).

Almost surely, 2^12913919 is an apocalyptic number.

12913919 is a deficient number, since it is larger than the sum of its proper divisors (176977).

12913919 is an equidigital number, since it uses as much as digits as its factorization.

12913919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176976.

The product of its digits is 4374, while the sum is 35.

The square root of 12913919 is about 3593.5941618385. The cubic root of 12913919 is about 234.6133312288.

The spelling of 12913919 in words is "twelve million, nine hundred thirteen thousand, nine hundred nineteen".