817072853 has 4 divisors (see below), whose sum is σ = 865135980. Its totient is φ = 769009728.

The previous prime is 817072849. The next prime is 817072891. The reversal of 817072853 is 358270718.

817072853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 627101764 + 189971089 = 25042^2 + 13783^2 .

It is a cyclic number.

It is not a de Polignac number, because 817072853 - 2² = 817072849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 817072853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817072843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24031538 + ... + 24031571.

It is an arithmetic number, because the mean of its divisors is an integer number (216283995).

Almost surely, 2^817072853 is an apocalyptic number.

It is an amenable number.

817072853 is a deficient number, since it is larger than the sum of its proper divisors (48063127).

817072853 is a wasteful number, since it uses less digits than its factorization.

817072853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48063126.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 817072853 is about 28584.4862294217. The cubic root of 817072853 is about 934.8751024224.

The spelling of 817072853 in words is "eight hundred seventeen million, seventy-two thousand, eight hundred fifty-three".