1213337903 has 2 divisors, whose sum is σ = 1213337904. Its totient is φ = 1213337902.

The previous prime is 1213337869. The next prime is 1213337921. The reversal of 1213337903 is 3097333121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3097333121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213337903 - 2⁸ = 1213337647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213337903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213337803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606668951 + 606668952.

It is an arithmetic number, because the mean of its divisors is an integer number (606668952).

Almost surely, 2^1213337903 is an apocalyptic number.

1213337903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213337903 is an equidigital number, since it uses as much as digits as its factorization.

1213337903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 1213337903 is about 34833.0002009589. Note that the first 3 decimals coincide. The cubic root of 1213337903 is about 1066.5811930317.

The spelling of 1213337903 in words is "one billion, two hundred thirteen million, three hundred thirty-seven thousand, nine hundred three".