861093427 has 2 divisors, whose sum is σ = 861093428. Its totient is φ = 861093426.

The previous prime is 861093421. The next prime is 861093449. The reversal of 861093427 is 724390168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861093427 - 2¹¹ = 861091379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 861093427.

It is not a weakly prime, because it can be changed into another prime (861093421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430546713 + 430546714.

It is an arithmetic number, because the mean of its divisors is an integer number (430546714).

Almost surely, 2^861093427 is an apocalyptic number.

861093427 is a deficient number, since it is larger than the sum of its proper divisors (1).

861093427 is an equidigital number, since it uses as much as digits as its factorization.

861093427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 861093427 is about 29344.3934508792. The cubic root of 861093427 is about 951.3713995645.

The spelling of 861093427 in words is "eight hundred sixty-one million, ninety-three thousand, four hundred twenty-seven".