861404361 has 8 divisors (see below), whose sum is σ = 1149325824. Its totient is φ = 573876240.

The previous prime is 861404359. The next prime is 861404413. The reversal of 861404361 is 163404168.

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

It is not a de Polignac number, because 861404361 - 2¹ = 861404359 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (861404321) 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 7 ways as a sum of consecutive naturals, for example, 93186 + ... + 102011.

It is an arithmetic number, because the mean of its divisors is an integer number (143665728).

Almost surely, 2^861404361 is an apocalyptic number.

It is an amenable number.

861404361 is a deficient number, since it is larger than the sum of its proper divisors (287921463).

861404361 is a wasteful number, since it uses less digits than its factorization.

861404361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196671.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 861404361 is about 29349.6909864482. The cubic root of 861404361 is about 951.4858966707.

The spelling of 861404361 in words is "eight hundred sixty-one million, four hundred four thousand, three hundred sixty-one".