1376245813 has 2 divisors, whose sum is σ = 1376245814. Its totient is φ = 1376245812.

The previous prime is 1376245799. The next prime is 1376245841. The reversal of 1376245813 is 3185426731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 831630244 + 544615569 = 28838^2 + 23337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376245813 - 2⁵ = 1376245781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376245853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688122906 + 688122907.

It is an arithmetic number, because the mean of its divisors is an integer number (688122907).

Almost surely, 2^1376245813 is an apocalyptic number.

It is an amenable number.

1376245813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376245813 is an equidigital number, since it uses as much as digits as its factorization.

1376245813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 1376245813 is about 37097.7871712047. The cubic root of 1376245813 is about 1112.3257818843.

The spelling of 1376245813 in words is "one billion, three hundred seventy-six million, two hundred forty-five thousand, eight hundred thirteen".