861103043 has 2 divisors, whose sum is σ = 861103044. Its totient is φ = 861103042.

The previous prime is 861103039. The next prime is 861103051. The reversal of 861103043 is 340301168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861103043 - 2² = 861103039 is a prime.

It is not a weakly prime, because it can be changed into another prime (861103013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430551521 + 430551522.

It is an arithmetic number, because the mean of its divisors is an integer number (430551522).

Almost surely, 2^861103043 is an apocalyptic number.

861103043 is a deficient number, since it is larger than the sum of its proper divisors (1).

861103043 is an equidigital number, since it uses as much as digits as its factorization.

861103043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 861103043 is about 29344.5572977341. The cubic root of 861103043 is about 951.3749409353.

The spelling of 861103043 in words is "eight hundred sixty-one million, one hundred three thousand, forty-three".