921047144 has 32 divisors (see below), whose sum is σ = 1836069120. Its totient is φ = 432184896.

The previous prime is 921047129. The next prime is 921047147. The reversal of 921047144 is 441740129.

It is a self number, because there is not a number n which added to its sum of digits gives 921047144.

It is not an unprimeable number, because it can be changed into a prime (921047147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37472 + ... + 56975.

It is an arithmetic number, because the mean of its divisors is an integer number (57377160).

Almost surely, 2^921047144 is an apocalyptic number.

It is an amenable number.

921047144 is a deficient number, since it is larger than the sum of its proper divisors (915021976).

921047144 is a wasteful number, since it uses less digits than its factorization.

921047144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94529 (or 94525 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 921047144 is about 30348.7585248557. The cubic root of 921047144 is about 972.9576865093.

The spelling of 921047144 in words is "nine hundred twenty-one million, forty-seven thousand, one hundred forty-four".