1520640113 has 2 divisors, whose sum is σ = 1520640114. Its totient is φ = 1520640112.

The previous prime is 1520640073. The next prime is 1520640127. The reversal of 1520640113 is 3110460251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929518144 + 591121969 = 30488^2 + 24313^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520640113 - 2²⁰ = 1519591537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1520640133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760320056 + 760320057.

It is an arithmetic number, because the mean of its divisors is an integer number (760320057).

Almost surely, 2^1520640113 is an apocalyptic number.

It is an amenable number.

1520640113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520640113 is an equidigital number, since it uses as much as digits as its factorization.

1520640113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1520640113 is about 38995.3857911420. The cubic root of 1520640113 is about 1149.9407941794.

The spelling of 1520640113 in words is "one billion, five hundred twenty million, six hundred forty thousand, one hundred thirteen".