812832745 has 4 divisors (see below), whose sum is σ = 975399300. Its totient is φ = 650266192.

The previous prime is 812832739. The next prime is 812832763. The reversal of 812832745 is 547238218.

It is a happy number.

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 601769961 + 211062784 = 24531^2 + 14528^2 .

It is a cyclic number.

It is not a de Polignac number, because 812832745 - 2³ = 812832737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 812832698 and 812832707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81283270 + ... + 81283279.

It is an arithmetic number, because the mean of its divisors is an integer number (243849825).

Almost surely, 2^812832745 is an apocalyptic number.

It is an amenable number.

812832745 is a deficient number, since it is larger than the sum of its proper divisors (162566555).

812832745 is a wasteful number, since it uses less digits than its factorization.

812832745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162566554.

The product of its digits is 107520, while the sum is 40.

The square root of 812832745 is about 28510.2217634307. The cubic root of 812832745 is about 933.2551538115.

The spelling of 812832745 in words is "eight hundred twelve million, eight hundred thirty-two thousand, seven hundred forty-five".