853565983 has 2 divisors, whose sum is σ = 853565984. Its totient is φ = 853565982.

The previous prime is 853565969. The next prime is 853566017. The reversal of 853565983 is 389565358.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853565983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 853565983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853545983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426782991 + 426782992.

It is an arithmetic number, because the mean of its divisors is an integer number (426782992).

Almost surely, 2^853565983 is an apocalyptic number.

853565983 is a deficient number, since it is larger than the sum of its proper divisors (1).

853565983 is an equidigital number, since it uses as much as digits as its factorization.

853565983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888000, while the sum is 52.

The square root of 853565983 is about 29215.8515706799. The cubic root of 853565983 is about 948.5910723276.

The spelling of 853565983 in words is "eight hundred fifty-three million, five hundred sixty-five thousand, nine hundred eighty-three".