13976781523 has 8 divisors (see below), whose sum is σ = 14814589392. Its totient is φ = 13140711936.

The previous prime is 13976781491. The next prime is 13976781631. The reversal of 13976781523 is 32518767931.

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 13976781523 - 2⁵ = 13976781491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13976721523) 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, 417990 + ... + 450187.

It is an arithmetic number, because the mean of its divisors is an integer number (1851823674).

Almost surely, 2^13976781523 is an apocalyptic number.

13976781523 is a deficient number, since it is larger than the sum of its proper divisors (837807869).

13976781523 is an equidigital number, since it uses as much as digits as its factorization.

13976781523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869141.

The product of its digits is 1905120, while the sum is 52.

The spelling of 13976781523 in words is "thirteen billion, nine hundred seventy-six million, seven hundred eighty-one thousand, five hundred twenty-three".