861743441 has 8 divisors (see below), whose sum is σ = 937600104. Its totient is φ = 787253760.

The previous prime is 861743339. The next prime is 861743501. The reversal of 861743441 is 144347168.

It is a happy number.

861743441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 105493441 + 756250000 = 10271^2 + 27500^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 861743441 - 2¹⁰ = 861742417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861743395 and 861743404.

It is not an unprimeable number, because it can be changed into a prime (861743041) 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, 340430 + ... + 342951.

It is an arithmetic number, because the mean of its divisors is an integer number (117200013).

Almost surely, 2^861743441 is an apocalyptic number.

It is an amenable number.

861743441 is a deficient number, since it is larger than the sum of its proper divisors (75856663).

861743441 is a wasteful number, since it uses less digits than its factorization.

861743441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683491.

The product of its digits is 64512, while the sum is 38.

The square root of 861743441 is about 29355.4669695442. The cubic root of 861743441 is about 951.6107267462.

The spelling of 861743441 in words is "eight hundred sixty-one million, seven hundred forty-three thousand, four hundred forty-one".