12889819 has 2 divisors, whose sum is σ = 12889820. Its totient is φ = 12889818.

The previous prime is 12889787. The next prime is 12889823. The reversal of 12889819 is 91898821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12889819 - 2⁵ = 12889787 is a prime.

It is a super-2 number, since 2×12889819² = 332294867705522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12889879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444909 + 6444910.

It is an arithmetic number, because the mean of its divisors is an integer number (6444910).

Almost surely, 2^12889819 is an apocalyptic number.

12889819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12889819 is an equidigital number, since it uses as much as digits as its factorization.

12889819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 46.

The square root of 12889819 is about 3590.2394070591. The cubic root of 12889819 is about 234.4672949451.

The spelling of 12889819 in words is "twelve million, eight hundred eighty-nine thousand, eight hundred nineteen".