13981790917 has 8 divisors (see below), whose sum is σ = 14362046496. Its totient is φ = 13601660112.

The previous prime is 13981790891. The next prime is 13981790923. The reversal of 13981790917 is 71909718931.

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 13981790917 - 2⁷ = 13981790789 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 (13981790117) 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, 223938 + ... + 279484.

It is an arithmetic number, because the mean of its divisors is an integer number (1795255812).

Almost surely, 2^13981790917 is an apocalyptic number.

It is an amenable number.

13981790917 is a deficient number, since it is larger than the sum of its proper divisors (380255579).

13981790917 is an equidigital number, since it uses as much as digits as its factorization.

13981790917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62387.

The product of its (nonzero) digits is 857304, while the sum is 55.

The spelling of 13981790917 in words is "thirteen billion, nine hundred eighty-one million, seven hundred ninety thousand, nine hundred seventeen".