13940487 has 12 divisors (see below), whose sum is σ = 21966984. Its totient is φ = 8448720.

The previous prime is 13940477. The next prime is 13940491. The reversal of 13940487 is 78404931.

It is a happy number.

13940487 is a `hidden beast` number, since 139 + 40 + 487 = 666.

It is not a de Polignac number, because 13940487 - 2¹⁰ = 13939463 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13940447) 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 11 ways as a sum of consecutive naturals, for example, 70308 + ... + 70505.

It is an arithmetic number, because the mean of its divisors is an integer number (1830582).

Almost surely, 2^13940487 is an apocalyptic number.

13940487 is a deficient number, since it is larger than the sum of its proper divisors (8026497).

13940487 is a wasteful number, since it uses less digits than its factorization.

13940487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140830 (or 140827 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13940487 is about 3733.6961579647. The cubic root of 13940487 is about 240.6722299375.

The spelling of 13940487 in words is "thirteen million, nine hundred forty thousand, four hundred eighty-seven".