13937927481 has 81 divisors (see below), whose sum is σ = 22172392879. Its totient is φ = 8436023904.

The previous prime is 13937927473. The next prime is 13937927501. The reversal of 13937927481 is 18472973931.

The square root of 13937927481 is 118059.

It is a perfect power (a square), and thus also a powerful number.

13937927481 is a `hidden beast` number, since 1 + 3 + 93 + 79 + 2 + 7 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7308711081 + 6629216400 = 85491^2 + 81420^2 .

It is not a de Polignac number, because 13937927481 - 2³ = 13937927473 is a prime.

It is a super-2 number, since 2×13937927481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13937927431) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 236236030 + ... + 236236088.

Almost surely, 2^13937927481 is an apocalyptic number.

13937927481 is the 118059-th square number.

13937927481 is the 59030-th centered octagonal number.

It is an amenable number.

13937927481 is a deficient number, since it is larger than the sum of its proper divisors (8234465398).

13937927481 is an equidigital number, since it uses as much as digits as its factorization.

13937927481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 114 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 13937927481 in words is "thirteen billion, nine hundred thirty-seven million, nine hundred twenty-seven thousand, four hundred eighty-one".