817342445 has 8 divisors (see below), whose sum is σ = 982010520. Its totient is φ = 653074240.

The previous prime is 817342441. The next prime is 817342457. The reversal of 817342445 is 544243718.

It can be written as a sum of positive squares in 4 ways, for example, as 56355049 + 760987396 = 7507^2 + 27586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 817342445 - 2² = 817342441 is a prime.

It is a super-3 number, since 3×817342445³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 817342399 and 817342408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817342441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95450 + ... + 103659.

It is an arithmetic number, because the mean of its divisors is an integer number (122751315).

Almost surely, 2^817342445 is an apocalyptic number.

It is an amenable number.

817342445 is a deficient number, since it is larger than the sum of its proper divisors (164668075).

817342445 is a wasteful number, since it uses less digits than its factorization.

817342445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199935.

The product of its digits is 107520, while the sum is 38.

The square root of 817342445 is about 28589.2015453388. The cubic root of 817342445 is about 934.9779113430.

The spelling of 817342445 in words is "eight hundred seventeen million, three hundred forty-two thousand, four hundred forty-five".