885642643 has 4 divisors (see below), whose sum is σ = 897774808. Its totient is φ = 873510480.

The previous prime is 885642587. The next prime is 885642671. The reversal of 885642643 is 346246588.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-885642643 is a prime.

It is a super-2 number, since 2×885642643² = 1568725782200050898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 885642593 and 885642602.

It is not an unprimeable number, because it can be changed into a prime (885642673) 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, 6065973 + ... + 6066118.

It is an arithmetic number, because the mean of its divisors is an integer number (224443702).

Almost surely, 2^885642643 is an apocalyptic number.

885642643 is a deficient number, since it is larger than the sum of its proper divisors (12132165).

885642643 is a wasteful number, since it uses less digits than its factorization.

885642643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12132164.

The product of its digits is 1105920, while the sum is 46.

The square root of 885642643 is about 29759.7487052562. The cubic root of 885642643 is about 960.3278115881.

The spelling of 885642643 in words is "eight hundred eighty-five million, six hundred forty-two thousand, six hundred forty-three".