873115813 has 2 divisors, whose sum is σ = 873115814. Its totient is φ = 873115812.

The previous prime is 873115741. The next prime is 873115819. The reversal of 873115813 is 318511378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796255524 + 76860289 = 28218^2 + 8767^2 .

It is a cyclic number.

It is not a de Polignac number, because 873115813 - 2¹³ = 873107621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873115819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436557906 + 436557907.

It is an arithmetic number, because the mean of its divisors is an integer number (436557907).

Almost surely, 2^873115813 is an apocalyptic number.

It is an amenable number.

873115813 is a deficient number, since it is larger than the sum of its proper divisors (1).

873115813 is an equidigital number, since it uses as much as digits as its factorization.

873115813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 873115813 is about 29548.5331784845. The cubic root of 873115813 is about 955.7785608539.

The spelling of 873115813 in words is "eight hundred seventy-three million, one hundred fifteen thousand, eight hundred thirteen".