12998387 has 4 divisors (see below), whose sum is σ = 13763016. Its totient is φ = 12233760.

The previous prime is 12998383. The next prime is 12998389. The reversal of 12998387 is 78389921.

12998387 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12998387 - 2² = 12998383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12998383) 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, 382289 + ... + 382322.

It is an arithmetic number, because the mean of its divisors is an integer number (3440754).

Almost surely, 2^12998387 is an apocalyptic number.

12998387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12998387 is a deficient number, since it is larger than the sum of its proper divisors (764629).

12998387 is an equidigital number, since it uses as much as digits as its factorization.

12998387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764628.

The product of its digits is 217728, while the sum is 47.

The square root of 12998387 is about 3605.3275856710. The cubic root of 12998387 is about 235.1237434907.

The spelling of 12998387 in words is "twelve million, nine hundred ninety-eight thousand, three hundred eighty-seven".