822147349 has 4 divisors (see below), whose sum is σ = 823033260. Its totient is φ = 821261440.

The previous prime is 822147343. The next prime is 822147371. The reversal of 822147349 is 943741228.

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 10923025 + 811224324 = 3305^2 + 28482^2 .

It is a cyclic number.

It is not a de Polignac number, because 822147349 - 2³ = 822147341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822147341) 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, 441562 + ... + 443419.

It is an arithmetic number, because the mean of its divisors is an integer number (205758315).

Almost surely, 2^822147349 is an apocalyptic number.

It is an amenable number.

822147349 is a deficient number, since it is larger than the sum of its proper divisors (885911).

822147349 is an equidigital number, since it uses as much as digits as its factorization.

822147349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885910.

The product of its digits is 96768, while the sum is 40.

The square root of 822147349 is about 28673.1119517920. Note that the first 3 decimals coincide. The cubic root of 822147349 is about 936.8064816780.

The spelling of 822147349 in words is "eight hundred twenty-two million, one hundred forty-seven thousand, three hundred forty-nine".