453579921 has 6 divisors (see below), whose sum is σ = 655171010. Its totient is φ = 302386608.

The previous prime is 453579911. The next prime is 453579943. The reversal of 453579921 is 129975354.

It is a happy number.

453579921 is a `hidden beast` number, since 4 + 53 + 579 + 9 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 390615696 + 62964225 = 19764^2 + 7935^2 .

It is not a de Polignac number, because 453579921 - 2⁹ = 453579409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (453579901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25198876 + ... + 25198893.

Almost surely, 2^453579921 is an apocalyptic number.

It is an amenable number.

453579921 is a deficient number, since it is larger than the sum of its proper divisors (201591089).

453579921 is a wasteful number, since it uses less digits than its factorization.

453579921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50397775 (or 50397772 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 453579921 is about 21297.4158291564. The cubic root of 453579921 is about 768.3361616343.

It can be divided in two parts, 45357 and 9921, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 453579921 in words is "four hundred fifty-three million, five hundred seventy-nine thousand, nine hundred twenty-one".