865772983 has 2 divisors, whose sum is σ = 865772984. Its totient is φ = 865772982.

The previous prime is 865772899. The next prime is 865772987. The reversal of 865772983 is 389277568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 865772983 - 2⁹ = 865772471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865772987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432886491 + 432886492.

It is an arithmetic number, because the mean of its divisors is an integer number (432886492).

Almost surely, 2^865772983 is an apocalyptic number.

865772983 is a deficient number, since it is larger than the sum of its proper divisors (1).

865772983 is an equidigital number, since it uses as much as digits as its factorization.

865772983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 865772983 is about 29424.0205104605. The cubic root of 865772983 is about 953.0916756572.

The spelling of 865772983 in words is "eight hundred sixty-five million, seven hundred seventy-two thousand, nine hundred eighty-three".