861434373 has 4 divisors (see below), whose sum is σ = 1148579168. Its totient is φ = 574289580.

The previous prime is 861434363. The next prime is 861434393. The reversal of 861434373 is 373434168.

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 861434373 - 2⁶ = 861434309 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 (861434323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143572393 + ... + 143572398.

It is an arithmetic number, because the mean of its divisors is an integer number (287144792).

Almost surely, 2^861434373 is an apocalyptic number.

It is an amenable number.

861434373 is a deficient number, since it is larger than the sum of its proper divisors (287144795).

861434373 is a wasteful number, since it uses less digits than its factorization.

861434373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287144794.

The product of its digits is 145152, while the sum is 39.

The square root of 861434373 is about 29350.2022650611. The cubic root of 861434373 is about 951.4969467127.

The spelling of 861434373 in words is "eight hundred sixty-one million, four hundred thirty-four thousand, three hundred seventy-three".