13858623 has 6 divisors (see below), whose sum is σ = 20018024. Its totient is φ = 9239076.

The previous prime is 13858601. The next prime is 13858631. The reversal of 13858623 is 32685831.

It is not a de Polignac number, because 13858623 - 2⁵ = 13858591 is a prime.

It is a super-2 number, since 2×13858623² = 384122862912258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13858633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 769915 + ... + 769932.

Almost surely, 2^13858623 is an apocalyptic number.

13858623 is a deficient number, since it is larger than the sum of its proper divisors (6159401).

13858623 is a wasteful number, since it uses less digits than its factorization.

13858623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539853 (or 1539850 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 13858623 is about 3722.7171528334. The cubic root of 13858623 is about 240.2001975408.

The spelling of 13858623 in words is "thirteen million, eight hundred fifty-eight thousand, six hundred twenty-three".