13987394 has 16 divisors (see below), whose sum is σ = 21326976. Its totient is φ = 6879600.

The previous prime is 13987387. The next prime is 13987397. The reversal of 13987394 is 49378931.

It is a happy number.

13987394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13987394² = 391294381822472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13987397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51479 + ... + 51749.

It is an arithmetic number, because the mean of its divisors is an integer number (1332936).

Almost surely, 2^13987394 is an apocalyptic number.

13987394 is a deficient number, since it is larger than the sum of its proper divisors (7339582).

13987394 is a wasteful number, since it uses less digits than its factorization.

13987394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601.

The product of its digits is 163296, while the sum is 44.

The square root of 13987394 is about 3739.9724597916. The cubic root of 13987394 is about 240.9418659962.

The spelling of 13987394 in words is "thirteen million, nine hundred eighty-seven thousand, three hundred ninety-four".