1375120913 has 2 divisors, whose sum is σ = 1375120914. Its totient is φ = 1375120912.

The previous prime is 1375120907. The next prime is 1375120921. The reversal of 1375120913 is 3190215731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 991431169 + 383689744 = 31487^2 + 19588^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375120913 - 2⁴ = 1375120897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1375120913.

It is not a weakly prime, because it can be changed into another prime (1375120963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687560456 + 687560457.

It is an arithmetic number, because the mean of its divisors is an integer number (687560457).

Almost surely, 2^1375120913 is an apocalyptic number.

It is an amenable number.

1375120913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375120913 is an equidigital number, since it uses as much as digits as its factorization.

1375120913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 1375120913 is about 37082.6227901965. The cubic root of 1375120913 is about 1112.0226392511.

The spelling of 1375120913 in words is "one billion, three hundred seventy-five million, one hundred twenty thousand, nine hundred thirteen".