921853874 has 4 divisors (see below), whose sum is σ = 1382780814. Its totient is φ = 460926936.

The previous prime is 921853873. The next prime is 921853879. The reversal of 921853874 is 478358129.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 644398225 + 277455649 = 25385^2 + 16657^2 .

It is not an unprimeable number, because it can be changed into a prime (921853873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230463467 + ... + 230463470.

Almost surely, 2^921853874 is an apocalyptic number.

921853874 is a deficient number, since it is larger than the sum of its proper divisors (460926940).

921853874 is a wasteful number, since it uses less digits than its factorization.

921853874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460926939.

The product of its digits is 483840, while the sum is 47.

The square root of 921853874 is about 30362.0466042722. The cubic root of 921853874 is about 973.2416694761.

The spelling of 921853874 in words is "nine hundred twenty-one million, eight hundred fifty-three thousand, eight hundred seventy-four".