817434955 has 4 divisors (see below), whose sum is σ = 980921952. Its totient is φ = 653947960.

The previous prime is 817434949. The next prime is 817434979. The reversal of 817434955 is 559434718.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 559434718 = 2 ⋅279717359.

It is not a de Polignac number, because 817434955 - 2⁵ = 817434923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 81743491 + ... + 81743500.

It is an arithmetic number, because the mean of its divisors is an integer number (245230488).

Almost surely, 2^817434955 is an apocalyptic number.

817434955 is a deficient number, since it is larger than the sum of its proper divisors (163486997).

817434955 is a wasteful number, since it uses less digits than its factorization.

817434955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163486996.

The product of its digits is 604800, while the sum is 46.

The square root of 817434955 is about 28590.8194181279. The cubic root of 817434955 is about 935.0131848256.

The spelling of 817434955 in words is "eight hundred seventeen million, four hundred thirty-four thousand, nine hundred fifty-five".