13623889 has 4 divisors (see below), whose sum is σ = 14216256. Its totient is φ = 13031524.

The previous prime is 13623877. The next prime is 13623901. The reversal of 13623889 is 98832631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98832631 = 89 ⋅1110479.

It is an interprime number because it is at equal distance from previous prime (13623877) and next prime (13623901).

It is not a de Polignac number, because 13623889 - 2¹³ = 13615697 is a prime.

It is a super-2 number, since 2×13623889² = 371220702968642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13620889) 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 3 ways as a sum of consecutive naturals, for example, 296149 + ... + 296194.

It is an arithmetic number, because the mean of its divisors is an integer number (3554064).

Almost surely, 2^13623889 is an apocalyptic number.

It is an amenable number.

13623889 is a deficient number, since it is larger than the sum of its proper divisors (592367).

13623889 is an equidigital number, since it uses as much as digits as its factorization.

13623889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592366.

The product of its digits is 62208, while the sum is 40.

The square root of 13623889 is about 3691.0552691608. The cubic root of 13623889 is about 238.8363170255.

It can be divided in two parts, 136 and 23889, that added together give a square (24025 = 155²).

The spelling of 13623889 in words is "thirteen million, six hundred twenty-three thousand, eight hundred eighty-nine".