814532813 has 2 divisors, whose sum is σ = 814532814. Its totient is φ = 814532812.

The previous prime is 814532783. The next prime is 814532821. The reversal of 814532813 is 318235418.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531855844 + 282676969 = 23062^2 + 16813^2 .

It is a cyclic number.

It is not a de Polignac number, because 814532813 - 2²⁴ = 797755597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814531813) 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, 407266406 + 407266407.

It is an arithmetic number, because the mean of its divisors is an integer number (407266407).

Almost surely, 2^814532813 is an apocalyptic number.

It is an amenable number.

814532813 is a deficient number, since it is larger than the sum of its proper divisors (1).

814532813 is an equidigital number, since it uses as much as digits as its factorization.

814532813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 814532813 is about 28540.0212508681. The cubic root of 814532813 is about 933.9053459431.

The spelling of 814532813 in words is "eight hundred fourteen million, five hundred thirty-two thousand, eight hundred thirteen".