1209915103 has 2 divisors, whose sum is σ = 1209915104. Its totient is φ = 1209915102.

The previous prime is 1209915071. The next prime is 1209915127. The reversal of 1209915103 is 3015199021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1209915103 - 2⁵ = 1209915071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209915163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604957551 + 604957552.

It is an arithmetic number, because the mean of its divisors is an integer number (604957552).

Almost surely, 2^1209915103 is an apocalyptic number.

1209915103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209915103 is an equidigital number, since it uses as much as digits as its factorization.

1209915103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 1209915103 is about 34783.8339318713. The cubic root of 1209915103 is about 1065.5773143013.

The spelling of 1209915103 in words is "one billion, two hundred nine million, nine hundred fifteen thousand, one hundred three".