13981949351 has 16 divisors (see below), whose sum is σ = 14427201600. Its totient is φ = 13540423680.

The previous prime is 13981949347. The next prime is 13981949357. The reversal of 13981949351 is 15394918931.

It is a cyclic number.

It is not a de Polignac number, because 13981949351 - 2² = 13981949347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13981949293 and 13981949302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981949357) 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, 9252686 + ... + 9254196.

It is an arithmetic number, because the mean of its divisors is an integer number (901700100).

Almost surely, 2^13981949351 is an apocalyptic number.

13981949351 is a deficient number, since it is larger than the sum of its proper divisors (445252249).

13981949351 is a wasteful number, since it uses less digits than its factorization.

13981949351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554.

The product of its digits is 1049760, while the sum is 53.

The spelling of 13981949351 in words is "thirteen billion, nine hundred eighty-one million, nine hundred forty-nine thousand, three hundred fifty-one".