1213612903 has 2 divisors, whose sum is σ = 1213612904. Its totient is φ = 1213612902.

The previous prime is 1213612901. The next prime is 1213612919. The reversal of 1213612903 is 3092163121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213612903 - 2¹ = 1213612901 is a prime.

Together with 1213612901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213612901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606806451 + 606806452.

It is an arithmetic number, because the mean of its divisors is an integer number (606806452).

Almost surely, 2^1213612903 is an apocalyptic number.

1213612903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213612903 is an equidigital number, since it uses as much as digits as its factorization.

1213612903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1213612903 is about 34836.9473834893. The cubic root of 1213612903 is about 1066.6617662644.

The spelling of 1213612903 in words is "one billion, two hundred thirteen million, six hundred twelve thousand, nine hundred three".