861675447 has 16 divisors (see below), whose sum is σ = 1236429792. Its totient is φ = 531793920.

The previous prime is 861675407. The next prime is 861675467. The reversal of 861675447 is 744576168.

It is not a de Polignac number, because 861675447 - 2¹⁰ = 861674423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861675396 and 861675405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861675407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135378 + ... + 141599.

It is an arithmetic number, because the mean of its divisors is an integer number (77276862).

Almost surely, 2^861675447 is an apocalyptic number.

861675447 is a deficient number, since it is larger than the sum of its proper divisors (374754345).

861675447 is a wasteful number, since it uses less digits than its factorization.

861675447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277058.

The product of its digits is 1128960, while the sum is 48.

The square root of 861675447 is about 29354.3088319245. The cubic root of 861675447 is about 951.5856978267.

The spelling of 861675447 in words is "eight hundred sixty-one million, six hundred seventy-five thousand, four hundred forty-seven".