921676869 has 12 divisors (see below), whose sum is σ = 1377218700. Its totient is φ = 593263104.

The previous prime is 921676853. The next prime is 921676883. The reversal of 921676869 is 968676129.

It can be written as a sum of positive squares in 2 ways, for example, as 609447969 + 312228900 = 24687^2 + 17670^2 .

It is not a de Polignac number, because 921676869 - 2⁴ = 921676853 is a prime.

It is a super-2 number, since 2×921676869² = 1698976501699286322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921676829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1765404 + ... + 1765925.

It is an arithmetic number, because the mean of its divisors is an integer number (114768225).

Almost surely, 2^921676869 is an apocalyptic number.

It is an amenable number.

921676869 is a deficient number, since it is larger than the sum of its proper divisors (455541831).

921676869 is a wasteful number, since it uses less digits than its factorization.

921676869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531364 (or 3531361 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 921676869 is about 30359.1315587255. The cubic root of 921676869 is about 973.1793748350.

The spelling of 921676869 in words is "nine hundred twenty-one million, six hundred seventy-six thousand, eight hundred sixty-nine".