861655283 has 2 divisors, whose sum is σ = 861655284. Its totient is φ = 861655282.

The previous prime is 861655237. The next prime is 861655307. The reversal of 861655283 is 382556168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861655283 - 2¹² = 861651187 is a prime.

It is not a weakly prime, because it can be changed into another prime (861651283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430827641 + 430827642.

It is an arithmetic number, because the mean of its divisors is an integer number (430827642).

Almost surely, 2^861655283 is an apocalyptic number.

861655283 is a deficient number, since it is larger than the sum of its proper divisors (1).

861655283 is an equidigital number, since it uses as much as digits as its factorization.

861655283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 861655283 is about 29353.9653709682. The cubic root of 861655283 is about 951.5782751078.

The spelling of 861655283 in words is "eight hundred sixty-one million, six hundred fifty-five thousand, two hundred eighty-three".