13888207 has 4 divisors (see below), whose sum is σ = 14025816. Its totient is φ = 13750600.

The previous prime is 13888181. The next prime is 13888249. The reversal of 13888207 is 70288831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70288831 = 7681 ⋅9151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13888207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68653 + ... + 68854.

It is an arithmetic number, because the mean of its divisors is an integer number (3506454).

Almost surely, 2^13888207 is an apocalyptic number.

13888207 is a deficient number, since it is larger than the sum of its proper divisors (137609).

13888207 is a wasteful number, since it uses less digits than its factorization.

13888207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137608.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 13888207 is about 3726.6884763822. The cubic root of 13888207 is about 240.3709945044.

The spelling of 13888207 in words is "thirteen million, eight hundred eighty-eight thousand, two hundred seven".