921047563 has 4 divisors (see below), whose sum is σ = 921125160. Its totient is φ = 920969968.

The previous prime is 921047557. The next prime is 921047599. The reversal of 921047563 is 365740129.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921047563 is a prime.

It is a super-2 number, since 2×921047563² = 1696657226616477938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921047663) 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, 16858 + ... + 46111.

It is an arithmetic number, because the mean of its divisors is an integer number (230281290).

Almost surely, 2^921047563 is an apocalyptic number.

921047563 is a deficient number, since it is larger than the sum of its proper divisors (77597).

921047563 is a wasteful number, since it uses less digits than its factorization.

921047563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77596.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 921047563 is about 30348.7654279379. The cubic root of 921047563 is about 972.9578340476.

The spelling of 921047563 in words is "nine hundred twenty-one million, forty-seven thousand, five hundred sixty-three".