861432983 has 2 divisors, whose sum is σ = 861432984. Its totient is φ = 861432982.

The previous prime is 861432977. The next prime is 861433019. The reversal of 861432983 is 389234168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861432983 - 2¹⁰ = 861431959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861432953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430716491 + 430716492.

It is an arithmetic number, because the mean of its divisors is an integer number (430716492).

Almost surely, 2^861432983 is an apocalyptic number.

861432983 is a deficient number, since it is larger than the sum of its proper divisors (1).

861432983 is an equidigital number, since it uses as much as digits as its factorization.

861432983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 861432983 is about 29350.1785854873. The cubic root of 861432983 is about 951.4964349378.

The spelling of 861432983 in words is "eight hundred sixty-one million, four hundred thirty-two thousand, nine hundred eighty-three".