13747381 has 2 divisors, whose sum is σ = 13747382. Its totient is φ = 13747380.

The previous prime is 13747333. The next prime is 13747411. The reversal of 13747381 is 18374731.

13747381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13024881 + 722500 = 3609^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 13747381 - 2¹³ = 13739189 is a prime.

It is a super-2 number, since 2×13747381² = 377980968718322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13742381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6873690 + 6873691.

It is an arithmetic number, because the mean of its divisors is an integer number (6873691).

Almost surely, 2^13747381 is an apocalyptic number.

It is an amenable number.

13747381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13747381 is an equidigital number, since it uses as much as digits as its factorization.

13747381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 13747381 is about 3707.7460808421. The cubic root of 13747381 is about 239.5557813072. Note that the first 3 decimals are identical.

The spelling of 13747381 in words is "thirteen million, seven hundred forty-seven thousand, three hundred eighty-one".