816864753 has 4 divisors (see below), whose sum is σ = 1089153008. Its totient is φ = 544576500.

The previous prime is 816864751. The next prime is 816864761. The reversal of 816864753 is 357468618.

816864753 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 816864753 - 2¹ = 816864751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816864751) 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, 136144123 + ... + 136144128.

It is an arithmetic number, because the mean of its divisors is an integer number (272288252).

Almost surely, 2^816864753 is an apocalyptic number.

It is an amenable number.

816864753 is a deficient number, since it is larger than the sum of its proper divisors (272288255).

816864753 is a wasteful number, since it uses less digits than its factorization.

816864753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272288254.

The product of its digits is 967680, while the sum is 48.

The square root of 816864753 is about 28580.8459112042. The cubic root of 816864753 is about 934.7957280121.

The spelling of 816864753 in words is "eight hundred sixteen million, eight hundred sixty-four thousand, seven hundred fifty-three".