861814471 has 16 divisors (see below), whose sum is σ = 1035088384. Its totient is φ = 702009504.

The previous prime is 861814451. The next prime is 861814537. The reversal of 861814471 is 174418168.

It is not a de Polignac number, because 861814471 - 2¹¹ = 861812423 is a prime.

It is a super-3 number, since 3×861814471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861814411) 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, 27555 + ... + 49828.

It is an arithmetic number, because the mean of its divisors is an integer number (64693024).

Almost surely, 2^861814471 is an apocalyptic number.

861814471 is a deficient number, since it is larger than the sum of its proper divisors (173273913).

861814471 is a wasteful number, since it uses less digits than its factorization.

861814471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77470.

The product of its digits is 43008, while the sum is 40.

The square root of 861814471 is about 29356.6767703703. The cubic root of 861814471 is about 951.6368718259.

The spelling of 861814471 in words is "eight hundred sixty-one million, eight hundred fourteen thousand, four hundred seventy-one".