13791919 has 8 divisors (see below), whose sum is σ = 13980672. Its totient is φ = 13604760.

The previous prime is 13791859. The next prime is 13791923. The reversal of 13791919 is 91919731.

13791919 = 168² + 169² + ... + 358².

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

It is a cyclic number.

It is not a de Polignac number, because 13791919 - 2¹¹ = 13789871 is a prime.

It is a super-2 number, since 2×13791919² = 380434059405122, 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 (13791959) 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, 30912 + ... + 31354.

It is an arithmetic number, because the mean of its divisors is an integer number (1747584).

Almost surely, 2^13791919 is an apocalyptic number.

13791919 is a deficient number, since it is larger than the sum of its proper divisors (188753).

13791919 is a wasteful number, since it uses less digits than its factorization.

13791919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797.

The product of its digits is 15309, while the sum is 40.

The square root of 13791919 is about 3713.7472988883. The cubic root of 13791919 is about 239.8142022653.

The spelling of 13791919 in words is "thirteen million, seven hundred ninety-one thousand, nine hundred nineteen".