12899923 has 4 divisors (see below), whose sum is σ = 13658760. Its totient is φ = 12141088.

The previous prime is 12899899. The next prime is 12899951. The reversal of 12899923 is 32999821.

12899923 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32999821 = 59 ⋅559319.

It is a cyclic number.

It is not a de Polignac number, because 12899923 - 2¹³ = 12891731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12899923.

It is not an unprimeable number, because it can be changed into a prime (12899123) 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, 379393 + ... + 379426.

It is an arithmetic number, because the mean of its divisors is an integer number (3414690).

Almost surely, 2^12899923 is an apocalyptic number.

12899923 is a deficient number, since it is larger than the sum of its proper divisors (758837).

12899923 is an equidigital number, since it uses as much as digits as its factorization.

12899923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758836.

The product of its digits is 69984, while the sum is 43.

The square root of 12899923 is about 3591.6462799112. The cubic root of 12899923 is about 234.5285432528.

The spelling of 12899923 in words is "twelve million, eight hundred ninety-nine thousand, nine hundred twenty-three".