13739731 has 8 divisors (see below), whose sum is σ = 13966560. Its totient is φ = 13514688.

The previous prime is 13739729. The next prime is 13739741. The reversal of 13739731 is 13793731.

13739731 = 29² + 30² + ... + 345².

It is a happy number.

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 13739731 - 2¹ = 13739729 is a prime.

It is a super-2 number, since 2×13739731² = 377560415904722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13739741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27970 + ... + 28456.

It is an arithmetic number, because the mean of its divisors is an integer number (1745820).

Almost surely, 2^13739731 is an apocalyptic number.

13739731 is a deficient number, since it is larger than the sum of its proper divisors (226829).

13739731 is an equidigital number, since it uses as much as digits as its factorization.

13739731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893.

The product of its digits is 11907, while the sum is 34.

The square root of 13739731 is about 3706.7143132429. The cubic root of 13739731 is about 239.5113378901.

The spelling of 13739731 in words is "thirteen million, seven hundred thirty-nine thousand, seven hundred thirty-one".