850584981 has 4 divisors (see below), whose sum is σ = 1134113312. Its totient is φ = 567056652.

The previous prime is 850584979. The next prime is 850585003. The reversal of 850584981 is 189485058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 850584981 - 2¹ = 850584979 is a prime.

It is a super-2 number, since 2×850584981² = 1446989619805540722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 850584981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850584901) 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, 141764161 + ... + 141764166.

It is an arithmetic number, because the mean of its divisors is an integer number (283528328).

Almost surely, 2^850584981 is an apocalyptic number.

It is an amenable number.

850584981 is a deficient number, since it is larger than the sum of its proper divisors (283528331).

850584981 is a wasteful number, since it uses less digits than its factorization.

850584981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283528330.

The product of its (nonzero) digits is 460800, while the sum is 48.

The square root of 850584981 is about 29164.7900901069. The cubic root of 850584981 is about 947.4854947736.

The spelling of 850584981 in words is "eight hundred fifty million, five hundred eighty-four thousand, nine hundred eighty-one".