12739898 has 4 divisors (see below), whose sum is σ = 19109850. Its totient is φ = 6369948.

The previous prime is 12739897. The next prime is 12739927. The reversal of 12739898 is 89893721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89893721 = 229 ⋅392549.

It can be written as a sum of positive squares in only one way, i.e., 10936249 + 1803649 = 3307^2 + 1343^2 .

It is not an unprimeable number, because it can be changed into a prime (12739897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3184973 + ... + 3184976.

Almost surely, 2^12739898 is an apocalyptic number.

12739898 is a deficient number, since it is larger than the sum of its proper divisors (6369952).

12739898 is an equidigital number, since it uses as much as digits as its factorization.

12739898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369951.

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

The square root of 12739898 is about 3569.2993710251. The cubic root of 12739898 is about 233.5547209459.

The spelling of 12739898 in words is "twelve million, seven hundred thirty-nine thousand, eight hundred ninety-eight".