12903557 has 2 divisors, whose sum is σ = 12903558. Its totient is φ = 12903556.

The previous prime is 12903511. The next prime is 12903559. The reversal of 12903557 is 75530921.

12903557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10233601 + 2669956 = 3199^2 + 1634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12903557 is a prime.

Together with 12903559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12903559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6451778 + 6451779.

It is an arithmetic number, because the mean of its divisors is an integer number (6451779).

Almost surely, 2^12903557 is an apocalyptic number.

It is an amenable number.

12903557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12903557 is an equidigital number, since it uses as much as digits as its factorization.

12903557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 12903557 is about 3592.1521404306. The cubic root of 12903557 is about 234.5505639710.

The spelling of 12903557 in words is "twelve million, nine hundred three thousand, five hundred fifty-seven".