453090821 has 2 divisors, whose sum is σ = 453090822. Its totient is φ = 453090820.

The previous prime is 453090811. The next prime is 453090829. The reversal of 453090821 is 128090354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305200900 + 147889921 = 17470^2 + 12161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-453090821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (453090829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226545410 + 226545411.

It is an arithmetic number, because the mean of its divisors is an integer number (226545411).

Almost surely, 2^453090821 is an apocalyptic number.

It is an amenable number.

453090821 is a deficient number, since it is larger than the sum of its proper divisors (1).

453090821 is an equidigital number, since it uses as much as digits as its factorization.

453090821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 453090821 is about 21285.9301182730. The cubic root of 453090821 is about 768.0598939880.

The spelling of 453090821 in words is "four hundred fifty-three million, ninety thousand, eight hundred twenty-one".