921717148 has 12 divisors (see below), whose sum is σ = 1759641912. Its totient is φ = 418962320.

The previous prime is 921717131. The next prime is 921717149. The reversal of 921717148 is 841717129.

921717148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 921717148.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921717149) 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, 10474015 + ... + 10474102.

It is an arithmetic number, because the mean of its divisors is an integer number (146636826).

Almost surely, 2^921717148 is an apocalyptic number.

It is an amenable number.

921717148 is a deficient number, since it is larger than the sum of its proper divisors (837924764).

921717148 is a wasteful number, since it uses less digits than its factorization.

921717148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20948132 (or 20948130 counting only the distinct ones).

The product of its digits is 28224, while the sum is 40.

The square root of 921717148 is about 30359.7949268436. The cubic root of 921717148 is about 973.1935512137.

The spelling of 921717148 in words is "nine hundred twenty-one million, seven hundred seventeen thousand, one hundred forty-eight".