921984146 has 8 divisors (see below), whose sum is σ = 1387081020. Its totient is φ = 459623808.

The previous prime is 921984143. The next prime is 921984163. The reversal of 921984146 is 641489129.

It can be written as a sum of positive squares in 2 ways, for example, as 811965025 + 110019121 = 28495^2 + 10489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 921984097 and 921984106.

It is not an unprimeable number, because it can be changed into a prime (921984143) 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, 683291 + ... + 684638.

Almost surely, 2^921984146 is an apocalyptic number.

921984146 is a deficient number, since it is larger than the sum of its proper divisors (465096874).

921984146 is a wasteful number, since it uses less digits than its factorization.

921984146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368268.

The product of its digits is 124416, while the sum is 44.

The square root of 921984146 is about 30364.1918384139. The cubic root of 921984146 is about 973.2875119429.

The spelling of 921984146 in words is "nine hundred twenty-one million, nine hundred eighty-four thousand, one hundred forty-six".