12928999 has 2 divisors, whose sum is σ = 12929000. Its totient is φ = 12928998.

The previous prime is 12928969. The next prime is 12929009. The reversal of 12928999 is 99982921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12928999 - 2¹¹ = 12926951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12928969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6464499 + 6464500.

It is an arithmetic number, because the mean of its divisors is an integer number (6464500).

Almost surely, 2^12928999 is an apocalyptic number.

12928999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12928999 is an equidigital number, since it uses as much as digits as its factorization.

12928999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 49.

The square root of 12928999 is about 3595.6917276096. The cubic root of 12928999 is about 234.7046175583.

The spelling of 12928999 in words is "twelve million, nine hundred twenty-eight thousand, nine hundred ninety-nine".