13940731 has 16 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 10880640.

The previous prime is 13940701. The next prime is 13940747. The reversal of 13940731 is 13704931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13940731 is a prime.

It is a super-2 number, since 2×13940731² = 388687961628722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13940731.

It is not an unprimeable number, because it can be changed into a prime (13940701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1800 + ... + 5578.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^13940731 is an apocalyptic number.

13940731 is a deficient number, since it is larger than the sum of its proper divisors (3477509).

13940731 is a wasteful number, since it uses less digits than its factorization.

13940731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 13940731 is about 3733.7288332175. The cubic root of 13940731 is about 240.6736340893.

The spelling of 13940731 in words is "thirteen million, nine hundred forty thousand, seven hundred thirty-one".