13888861 has 4 divisors (see below), whose sum is σ = 15872992. Its totient is φ = 11904732.

The previous prime is 13888843. The next prime is 13888879. The reversal of 13888861 is 16888831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (13888843) and next prime (13888879).

It is not a de Polignac number, because 13888861 - 2¹⁹ = 13364573 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 (13888841) 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, 992055 + ... + 992068.

It is an arithmetic number, because the mean of its divisors is an integer number (3968248).

Almost surely, 2^13888861 is an apocalyptic number.

It is an amenable number.

13888861 is a deficient number, since it is larger than the sum of its proper divisors (1984131).

13888861 is an equidigital number, since it uses as much as digits as its factorization.

13888861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984130.

The product of its digits is 73728, while the sum is 43.

The square root of 13888861 is about 3726.7762208107. The cubic root of 13888861 is about 240.3747674935.

The spelling of 13888861 in words is "thirteen million, eight hundred eighty-eight thousand, eight hundred sixty-one".