1373203613 has 2 divisors, whose sum is σ = 1373203614. Its totient is φ = 1373203612.

The previous prime is 1373203571. The next prime is 1373203619. The reversal of 1373203613 is 3163023731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695798884 + 677404729 = 26378^2 + 26027^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373203613 - 2⁸ = 1373203357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373203619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686601806 + 686601807.

It is an arithmetic number, because the mean of its divisors is an integer number (686601807).

Almost surely, 2^1373203613 is an apocalyptic number.

It is an amenable number.

1373203613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373203613 is an equidigital number, since it uses as much as digits as its factorization.

1373203613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 29.

The square root of 1373203613 is about 37056.7620414952. The cubic root of 1373203613 is about 1111.5055761917.

The spelling of 1373203613 in words is "one billion, three hundred seventy-three million, two hundred three thousand, six hundred thirteen".