921483409 has 16 divisors (see below), whose sum is σ = 1179916416. Its totient is φ = 698630400.

The previous prime is 921483383. The next prime is 921483443. The reversal of 921483409 is 904384129.

It is a cyclic number.

It is not a de Polignac number, because 921483409 - 2¹⁵ = 921450641 is a prime.

It is a super-2 number, since 2×921483409² = 1698263346124522562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (921483469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158872 + ... + 164569.

It is an arithmetic number, because the mean of its divisors is an integer number (73744776).

Almost surely, 2^921483409 is an apocalyptic number.

It is an amenable number.

921483409 is a deficient number, since it is larger than the sum of its proper divisors (258433007).

921483409 is a wasteful number, since it uses less digits than its factorization.

921483409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323496.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 921483409 is about 30355.9452002404. The cubic root of 921483409 is about 973.1112799446. Note that the first 3 decimals are identical.

The spelling of 921483409 in words is "nine hundred twenty-one million, four hundred eighty-three thousand, four hundred nine".