861420183 has 32 divisors (see below), whose sum is σ = 1287207936. Its totient is φ = 508979328.

The previous prime is 861420169. The next prime is 861420227. The reversal of 861420183 is 381024168.

It is not a de Polignac number, because 861420183 - 2⁵ = 861420151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861420143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92716 + ... + 101582.

It is an arithmetic number, because the mean of its divisors is an integer number (40225248).

Almost surely, 2^861420183 is an apocalyptic number.

861420183 is a deficient number, since it is larger than the sum of its proper divisors (425787753).

861420183 is a wasteful number, since it uses less digits than its factorization.

861420183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8983.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 861420183 is about 29349.9605280825. The cubic root of 861420183 is about 951.4917221646.

The spelling of 861420183 in words is "eight hundred sixty-one million, four hundred twenty thousand, one hundred eighty-three".