921874869 has 24 divisors (see below), whose sum is σ = 1411717632. Its totient is φ = 578676960.

The previous prime is 921874853. The next prime is 921874901. The reversal of 921874869 is 968478129.

It is not a de Polignac number, because 921874869 - 2⁴ = 921874853 is a prime.

It is a super-2 number, since 2×921874869² = 1699706548187534322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921874819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34329 + ... + 54974.

It is an arithmetic number, because the mean of its divisors is an integer number (58821568).

Almost surely, 2^921874869 is an apocalyptic number.

It is an amenable number.

921874869 is a deficient number, since it is larger than the sum of its proper divisors (489842763).

921874869 is a wasteful number, since it uses less digits than its factorization.

921874869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89377 (or 89374 counting only the distinct ones).

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

The square root of 921874869 is about 30362.3923464539. The cubic root of 921874869 is about 973.2490578682.

The spelling of 921874869 in words is "nine hundred twenty-one million, eight hundred seventy-four thousand, eight hundred sixty-nine".