855065983 has 4 divisors (see below), whose sum is σ = 905364000. Its totient is φ = 804767968.

The previous prime is 855065977. The next prime is 855065989. The reversal of 855065983 is 389560558.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (855065977) and next prime (855065989).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855065983 is a prime.

It is a super-2 number, since 2×855065983² = 1462275670567512578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855065989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25148983 + ... + 25149016.

It is an arithmetic number, because the mean of its divisors is an integer number (226341000).

Almost surely, 2^855065983 is an apocalyptic number.

855065983 is a deficient number, since it is larger than the sum of its proper divisors (50298017).

855065983 is a wasteful number, since it uses less digits than its factorization.

855065983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50298016.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The square root of 855065983 is about 29241.5112981528. The cubic root of 855065983 is about 949.1464107369.

The spelling of 855065983 in words is "eight hundred fifty-five million, sixty-five thousand, nine hundred eighty-three".