812447135 has 8 divisors (see below), whose sum is σ = 975120336. Its totient is φ = 649835200.

The previous prime is 812447099. The next prime is 812447137. The reversal of 812447135 is 531744218.

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

It is not a de Polignac number, because 812447135 - 2¹⁶ = 812381599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812447095 and 812447104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812447137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22235 + ... + 46035.

It is an arithmetic number, because the mean of its divisors is an integer number (121890042).

Almost surely, 2^812447135 is an apocalyptic number.

812447135 is a deficient number, since it is larger than the sum of its proper divisors (162673201).

812447135 is a wasteful number, since it uses less digits than its factorization.

812447135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30633.

The product of its digits is 26880, while the sum is 35.

The square root of 812447135 is about 28503.4582989503. The cubic root of 812447135 is about 933.1075508985.

The spelling of 812447135 in words is "eight hundred twelve million, four hundred forty-seven thousand, one hundred thirty-five".