12499889 has 4 divisors (see below), whose sum is σ = 12595440. Its totient is φ = 12404340.

The previous prime is 12499873. The next prime is 12499897. The reversal of 12499889 is 98899421.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 12499889 - 2⁴ = 12499873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12499589) 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, 47579 + ... + 47840.

It is an arithmetic number, because the mean of its divisors is an integer number (3148860).

Almost surely, 2^12499889 is an apocalyptic number.

It is an amenable number.

12499889 is a deficient number, since it is larger than the sum of its proper divisors (95551).

12499889 is an equidigital number, since it uses as much as digits as its factorization.

12499889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95550.

The product of its digits is 373248, while the sum is 50.

The square root of 12499889 is about 3535.5182081273. The cubic root of 12499889 is about 232.0787547235.

The spelling of 12499889 in words is "twelve million, four hundred ninety-nine thousand, eight hundred eighty-nine".