817022513 has 2 divisors, whose sum is σ = 817022514. Its totient is φ = 817022512.

The previous prime is 817022509. The next prime is 817022579. The reversal of 817022513 is 315220718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 578258209 + 238764304 = 24047^2 + 15452^2 .

It is a cyclic number.

It is not a de Polignac number, because 817022513 - 2² = 817022509 is a prime.

It is not a weakly prime, because it can be changed into another prime (817022413) 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, 408511256 + 408511257.

It is an arithmetic number, because the mean of its divisors is an integer number (408511257).

Almost surely, 2^817022513 is an apocalyptic number.

It is an amenable number.

817022513 is a deficient number, since it is larger than the sum of its proper divisors (1).

817022513 is an equidigital number, since it uses as much as digits as its factorization.

817022513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 817022513 is about 28583.6056682847. The cubic root of 817022513 is about 934.8559027557.

The spelling of 817022513 in words is "eight hundred seventeen million, twenty-two thousand, five hundred thirteen".