817491055 has 8 divisors (see below), whose sum is σ = 1032620400. Its totient is φ = 619572096.

The previous prime is 817491029. The next prime is 817491067. The reversal of 817491055 is 550194718.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 817491055 - 2¹¹ = 817489007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 817490999 and 817491017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4302490 + ... + 4302679.

It is an arithmetic number, because the mean of its divisors is an integer number (129077550).

Almost surely, 2^817491055 is an apocalyptic number.

817491055 is a deficient number, since it is larger than the sum of its proper divisors (215129345).

817491055 is a wasteful number, since it uses less digits than its factorization.

817491055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605193.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 817491055 is about 28591.8004854539. The cubic root of 817491055 is about 935.0345741073.

The spelling of 817491055 in words is "eight hundred seventeen million, four hundred ninety-one thousand, fifty-five".