817350553 has 2 divisors, whose sum is σ = 817350554. Its totient is φ = 817350552.

The previous prime is 817350481. The next prime is 817350613. The reversal of 817350553 is 355053718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810939529 + 6411024 = 28477^2 + 2532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-817350553 is a prime.

It is not a weakly prime, because it can be changed into another prime (817357553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408675276 + 408675277.

It is an arithmetic number, because the mean of its divisors is an integer number (408675277).

Almost surely, 2^817350553 is an apocalyptic number.

It is an amenable number.

817350553 is a deficient number, since it is larger than the sum of its proper divisors (1).

817350553 is an equidigital number, since it uses as much as digits as its factorization.

817350553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 817350553 is about 28589.3433467787. The cubic root of 817350553 is about 934.9810029789.

The spelling of 817350553 in words is "eight hundred seventeen million, three hundred fifty thousand, five hundred fifty-three".