861093439 has 16 divisors (see below), whose sum is σ = 904619520. Its totient is φ = 818792640.

The previous prime is 861093427. The next prime is 861093449. The reversal of 861093439 is 934390168.

It is not a de Polignac number, because 861093439 - 2⁵ = 861093407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861093395 and 861093404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861093449) 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, 544552 + ... + 546130.

It is an arithmetic number, because the mean of its divisors is an integer number (56538720).

Almost surely, 2^861093439 is an apocalyptic number.

861093439 is a deficient number, since it is larger than the sum of its proper divisors (43526081).

861093439 is a wasteful number, since it uses less digits than its factorization.

861093439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 861093439 is about 29344.3936553475. The cubic root of 861093439 is about 951.3714039839.

The spelling of 861093439 in words is "eight hundred sixty-one million, ninety-three thousand, four hundred thirty-nine".