1313121703 has 2 divisors, whose sum is σ = 1313121704. Its totient is φ = 1313121702.

The previous prime is 1313121683. The next prime is 1313121721. The reversal of 1313121703 is 3071213131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313121703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313121793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656560851 + 656560852.

It is an arithmetic number, because the mean of its divisors is an integer number (656560852).

Almost surely, 2^1313121703 is an apocalyptic number.

1313121703 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313121703 is an equidigital number, since it uses as much as digits as its factorization.

1313121703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1313121703 is about 36237.0211662051. The cubic root of 1313121703 is about 1095.0526313464.

Adding to 1313121703 its reverse (3071213131), we get a palindrome (4384334834).

The spelling of 1313121703 in words is "one billion, three hundred thirteen million, one hundred twenty-one thousand, seven hundred three".