12903391 has 16 divisors (see below), whose sum is σ = 14516928. Its totient is φ = 11404800.

The previous prime is 12903383. The next prime is 12903421. The reversal of 12903391 is 19330921.

It is a cyclic number.

It is not a de Polignac number, because 12903391 - 2³ = 12903383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12903791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23581 + ... + 24121.

It is an arithmetic number, because the mean of its divisors is an integer number (907308).

Almost surely, 2^12903391 is an apocalyptic number.

12903391 is a deficient number, since it is larger than the sum of its proper divisors (1613537).

12903391 is a wasteful number, since it uses less digits than its factorization.

12903391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 12903391 is about 3592.1290344307. The cubic root of 12903391 is about 234.5495581615.

The spelling of 12903391 in words is "twelve million, nine hundred three thousand, three hundred ninety-one".