13981790919 has 16 divisors (see below), whose sum is σ = 19625087232. Its totient is φ = 8837017728.

The previous prime is 13981790891. The next prime is 13981790923. The reversal of 13981790919 is 91909718931.

It is not a de Polignac number, because 13981790919 - 2¹¹ = 13981788871 is a prime.

It is a super-2 number, since 2×13981790919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981790219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888817 + ... + 904410.

It is an arithmetic number, because the mean of its divisors is an integer number (1226567952).

Almost surely, 2^13981790919 is an apocalyptic number.

13981790919 is a deficient number, since it is larger than the sum of its proper divisors (5643296313).

13981790919 is a wasteful number, since it uses less digits than its factorization.

13981790919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793366.

The product of its (nonzero) digits is 1102248, while the sum is 57.

The spelling of 13981790919 in words is "thirteen billion, nine hundred eighty-one million, seven hundred ninety thousand, nine hundred nineteen".