921248563 has 8 divisors (see below), whose sum is σ = 925960896. Its totient is φ = 916545000.

The previous prime is 921248527. The next prime is 921248567. The reversal of 921248563 is 365842129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921248563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921248567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322620 + ... + 325462.

It is an arithmetic number, because the mean of its divisors is an integer number (115745112).

Almost surely, 2^921248563 is an apocalyptic number.

921248563 is a deficient number, since it is larger than the sum of its proper divisors (4712333).

921248563 is a wasteful number, since it uses less digits than its factorization.

921248563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385.

The product of its digits is 103680, while the sum is 40.

The square root of 921248563 is about 30352.0767493758. The cubic root of 921248563 is about 973.0286050220.

It can be divided in two parts, 9212 and 48563, that added together give a palindrome (57775).

The spelling of 921248563 in words is "nine hundred twenty-one million, two hundred forty-eight thousand, five hundred sixty-three".