12890447 has 2 divisors, whose sum is σ = 12890448. Its totient is φ = 12890446.

The previous prime is 12890431. The next prime is 12890461. The reversal of 12890447 is 74409821.

12890447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12890447 - 2⁴ = 12890431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12890477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445223 + 6445224.

It is an arithmetic number, because the mean of its divisors is an integer number (6445224).

Almost surely, 2^12890447 is an apocalyptic number.

12890447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12890447 is an equidigital number, since it uses as much as digits as its factorization.

12890447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 12890447 is about 3590.3268653425. The cubic root of 12890447 is about 234.4711026807.

The spelling of 12890447 in words is "twelve million, eight hundred ninety thousand, four hundred forty-seven".