454929821 has 2 divisors, whose sum is σ = 454929822. Its totient is φ = 454929820.

The previous prime is 454929803. The next prime is 454929851. The reversal of 454929821 is 128929454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453093796 + 1836025 = 21286^2 + 1355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-454929821 is a prime.

It is a super-2 number, since 2×454929821² = 413922284070184082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (454929851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227464910 + 227464911.

It is an arithmetic number, because the mean of its divisors is an integer number (227464911).

Almost surely, 2^454929821 is an apocalyptic number.

It is an amenable number.

454929821 is a deficient number, since it is larger than the sum of its proper divisors (1).

454929821 is an equidigital number, since it uses as much as digits as its factorization.

454929821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 454929821 is about 21329.0839231318. The cubic root of 454929821 is about 769.0976222720.

The spelling of 454929821 in words is "four hundred fifty-four million, nine hundred twenty-nine thousand, eight hundred twenty-one".