12489967 has 4 divisors (see below), whose sum is σ = 14274256. Its totient is φ = 10705680.

The previous prime is 12489959. The next prime is 12489991. The reversal of 12489967 is 76998421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12489967 - 2³ = 12489959 is a prime.

It is a super-2 number, since 2×12489967² = 311998551322178, 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 (12489907) 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, 892134 + ... + 892147.

It is an arithmetic number, because the mean of its divisors is an integer number (3568564).

Almost surely, 2^12489967 is an apocalyptic number.

12489967 is a deficient number, since it is larger than the sum of its proper divisors (1784289).

12489967 is an equidigital number, since it uses as much as digits as its factorization.

12489967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784288.

The product of its digits is 217728, while the sum is 46.

The square root of 12489967 is about 3534.1147406387. The cubic root of 12489967 is about 232.0173329797.

It can be divided in two parts, 12489 and 967, that added together give a square (13456 = 116²).

The spelling of 12489967 in words is "twelve million, four hundred eighty-nine thousand, nine hundred sixty-seven".