812884349 has 4 divisors (see below), whose sum is σ = 817140480. Its totient is φ = 808628220.

The previous prime is 812884337. The next prime is 812884361. The reversal of 812884349 is 943488218.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 943488218 = 2 ⋅471744109.

It is an interprime number because it is at equal distance from previous prime (812884337) and next prime (812884361).

It is a cyclic number.

It is not a de Polignac number, because 812884349 - 2¹⁶ = 812818813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812884399) 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, 2127779 + ... + 2128160.

It is an arithmetic number, because the mean of its divisors is an integer number (204285120).

Almost surely, 2^812884349 is an apocalyptic number.

It is an amenable number.

812884349 is a deficient number, since it is larger than the sum of its proper divisors (4256131).

812884349 is a wasteful number, since it uses less digits than its factorization.

812884349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256130.

The product of its digits is 442368, while the sum is 47.

The square root of 812884349 is about 28511.1267578116. The cubic root of 812884349 is about 933.2749031307.

The spelling of 812884349 in words is "eight hundred twelve million, eight hundred eighty-four thousand, three hundred forty-nine".