12990886 has 4 divisors (see below), whose sum is σ = 19486332. Its totient is φ = 6495442.

The previous prime is 12990871. The next prime is 12990899. The reversal of 12990886 is 68809921.

It is a happy number.

12990886 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 68809921 = 373 ⋅184477.

It is a super-3 number, since 3×12990886³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3247720 + ... + 3247723.

It is an arithmetic number, because the mean of its divisors is an integer number (4871583).

Almost surely, 2^12990886 is an apocalyptic number.

12990886 is a deficient number, since it is larger than the sum of its proper divisors (6495446).

12990886 is an equidigital number, since it uses as much as digits as its factorization.

12990886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495445.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 12990886 is about 3604.2871694692. The cubic root of 12990886 is about 235.0785070430.

The spelling of 12990886 in words is "twelve million, nine hundred ninety thousand, eight hundred eighty-six".