810487913 has 2 divisors, whose sum is σ = 810487914. Its totient is φ = 810487912.

The previous prime is 810487891. The next prime is 810487927. The reversal of 810487913 is 319784018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619163689 + 191324224 = 24883^2 + 13832^2 .

It is a cyclic number.

It is not a de Polignac number, because 810487913 - 2¹⁶ = 810422377 is a prime.

It is not a weakly prime, because it can be changed into another prime (810487943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405243956 + 405243957.

It is an arithmetic number, because the mean of its divisors is an integer number (405243957).

Almost surely, 2^810487913 is an apocalyptic number.

It is an amenable number.

810487913 is a deficient number, since it is larger than the sum of its proper divisors (1).

810487913 is an equidigital number, since it uses as much as digits as its factorization.

810487913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 810487913 is about 28469.0694087460. The cubic root of 810487913 is about 932.3568820121.

The spelling of 810487913 in words is "eight hundred ten million, four hundred eighty-seven thousand, nine hundred thirteen".