817340427 has 12 divisors (see below), whose sum is σ = 1197231984. Its totient is φ = 537218640.

The previous prime is 817340417. The next prime is 817340473. The reversal of 817340427 is 724043718.

It is a happy number.

It is not a de Polignac number, because 817340427 - 2⁸ = 817340171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 817340391 and 817340400.

It is not an unprimeable number, because it can be changed into a prime (817340417) 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 in 11 ways as a sum of consecutive naturals, for example, 638908 + ... + 640185.

It is an arithmetic number, because the mean of its divisors is an integer number (99769332).

Almost surely, 2^817340427 is an apocalyptic number.

817340427 is a deficient number, since it is larger than the sum of its proper divisors (379891557).

817340427 is a wasteful number, since it uses less digits than its factorization.

817340427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279170 (or 1279167 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 817340427 is about 28589.1662522712. The cubic root of 817340427 is about 934.9771418626.

The spelling of 817340427 in words is "eight hundred seventeen million, three hundred forty thousand, four hundred twenty-seven".