12408993 has 6 divisors (see below), whose sum is σ = 17924114. Its totient is φ = 8272656.

The previous prime is 12408989. The next prime is 12409037. The reversal of 12408993 is 39980421.

12408993 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7884864 + 4524129 = 2808^2 + 2127^2 .

It is not a de Polignac number, because 12408993 - 2² = 12408989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12408923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 689380 + ... + 689397.

Almost surely, 2^12408993 is an apocalyptic number.

It is an amenable number.

12408993 is a deficient number, since it is larger than the sum of its proper divisors (5515121).

12408993 is a wasteful number, since it uses less digits than its factorization.

12408993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378783 (or 1378780 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 12408993 is about 3522.6400610905. The cubic root of 12408993 is about 231.5148464994.

The spelling of 12408993 in words is "twelve million, four hundred eight thousand, nine hundred ninety-three".