12889469 has 2 divisors, whose sum is σ = 12889470. Its totient is φ = 12889468.

The previous prime is 12889447. The next prime is 12889477. The reversal of 12889469 is 96498821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 1369 = 3590^2 + 37^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12889469 is a prime.

It is a super-2 number, since 2×12889469² = 332276822203922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12889169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444734 + 6444735.

It is an arithmetic number, because the mean of its divisors is an integer number (6444735).

Almost surely, 2^12889469 is an apocalyptic number.

It is an amenable number.

12889469 is a deficient number, since it is larger than the sum of its proper divisors (1).

12889469 is an equidigital number, since it uses as much as digits as its factorization.

12889469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 47.

The square root of 12889469 is about 3590.1906634606. The cubic root of 12889469 is about 234.4651727457.

The spelling of 12889469 in words is "twelve million, eight hundred eighty-nine thousand, four hundred sixty-nine".