861090543 has 6 divisors (see below), whose sum is σ = 1243797464. Its totient is φ = 574060356.

The previous prime is 861090467. The next prime is 861090547. The reversal of 861090543 is 345090168.

861090543 is a `hidden beast` number, since 8 + 6 + 109 + 0 + 543 = 666.

It is not a de Polignac number, because 861090543 - 2⁸ = 861090287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861090498 and 861090507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861090547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47838355 + ... + 47838372.

Almost surely, 2^861090543 is an apocalyptic number.

861090543 is a deficient number, since it is larger than the sum of its proper divisors (382706921).

861090543 is a wasteful number, since it uses less digits than its factorization.

861090543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95676733 (or 95676730 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 861090543 is about 29344.3443102755. The cubic root of 861090543 is about 951.3703374428.

The spelling of 861090543 in words is "eight hundred sixty-one million, ninety thousand, five hundred forty-three".