921869874 has 24 divisors (see below), whose sum is σ = 2051369580. Its totient is φ = 298984608.

The previous prime is 921869857. The next prime is 921869887. The reversal of 921869874 is 478968129.

It can be written as a sum of positive squares in 2 ways, for example, as 905588649 + 16281225 = 30093^2 + 4035^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 921869874.

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 11 ways as a sum of consecutive naturals, for example, 691429 + ... + 692760.

Almost surely, 2^921869874 is an apocalyptic number.

921869874 is an abundant number, since it is smaller than the sum of its proper divisors (1129499706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921869874 is a wasteful number, since it uses less digits than its factorization.

921869874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384234 (or 1384231 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 921869874 is about 30362.3100899783. The cubic root of 921869874 is about 973.2473000780.

The spelling of 921869874 in words is "nine hundred twenty-one million, eight hundred sixty-nine thousand, eight hundred seventy-four".