1213435903 has 2 divisors, whose sum is σ = 1213435904. Its totient is φ = 1213435902.

The previous prime is 1213435871. The next prime is 1213435913. The reversal of 1213435903 is 3095343121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213435903 - 2⁵ = 1213435871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213435913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606717951 + 606717952.

It is an arithmetic number, because the mean of its divisors is an integer number (606717952).

Almost surely, 2^1213435903 is an apocalyptic number.

1213435903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213435903 is an equidigital number, since it uses as much as digits as its factorization.

1213435903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1213435903 is about 34834.4068845732. The cubic root of 1213435903 is about 1066.6099077980.

The spelling of 1213435903 in words is "one billion, two hundred thirteen million, four hundred thirty-five thousand, nine hundred three".