12279998 has 4 divisors (see below), whose sum is σ = 18420000. Its totient is φ = 6139998.

The previous prime is 12279991. The next prime is 12280003. The reversal of 12279998 is 89997221.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12279991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3069998 + ... + 3070001.

It is an arithmetic number, because the mean of its divisors is an integer number (4605000).

Almost surely, 2^12279998 is an apocalyptic number.

12279998 is a deficient number, since it is larger than the sum of its proper divisors (6140002).

12279998 is an equidigital number, since it uses as much as digits as its factorization.

12279998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140001.

The product of its digits is 163296, while the sum is 47.

The square root of 12279998 is about 3504.2828082220. The cubic root of 12279998 is about 230.7098297426.

The spelling of 12279998 in words is "twelve million, two hundred seventy-nine thousand, nine hundred ninety-eight".