921984075 has 18 divisors (see below), whose sum is σ = 1651376324. Its totient is φ = 491724720.

The previous prime is 921984053. The next prime is 921984083. The reversal of 921984075 is 570489129.

It is not a de Polignac number, because 921984075 - 2¹⁴ = 921967691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 921984075.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2048629 + ... + 2049078.

Almost surely, 2^921984075 is an apocalyptic number.

921984075 is a deficient number, since it is larger than the sum of its proper divisors (729392249).

921984075 is a wasteful number, since it uses less digits than its factorization.

921984075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097723 (or 4097715 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 921984075 is about 30364.1906692736. The cubic root of 921984075 is about 973.2874869593.

The spelling of 921984075 in words is "nine hundred twenty-one million, nine hundred eighty-four thousand, seventy-five".