845722747 has 4 divisors (see below), whose sum is σ = 863716896. Its totient is φ = 827728600.

The previous prime is 845722741. The next prime is 845722799. The reversal of 845722747 is 747227548.

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

It is a cyclic number.

It is not a de Polignac number, because 845722747 - 2¹⁵ = 845689979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 845722697 and 845722706.

It is not an unprimeable number, because it can be changed into a prime (845722741) 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, 8997004 + ... + 8997097.

It is an arithmetic number, because the mean of its divisors is an integer number (215929224).

Almost surely, 2^845722747 is an apocalyptic number.

845722747 is a deficient number, since it is larger than the sum of its proper divisors (17994149).

845722747 is a wasteful number, since it uses less digits than its factorization.

845722747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17994148.

The product of its digits is 878080, while the sum is 46.

The square root of 845722747 is about 29081.3126767001. The cubic root of 845722747 is about 945.6766602768.

The spelling of 845722747 in words is "eight hundred forty-five million, seven hundred twenty-two thousand, seven hundred forty-seven".