454198621 has 2 divisors, whose sum is σ = 454198622. Its totient is φ = 454198620.

The previous prime is 454198607. The next prime is 454198631. The reversal of 454198621 is 126891454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423783396 + 30415225 = 20586^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 454198621 - 2²⁷ = 319980893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (454198631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227099310 + 227099311.

It is an arithmetic number, because the mean of its divisors is an integer number (227099311).

Almost surely, 2^454198621 is an apocalyptic number.

It is an amenable number.

454198621 is a deficient number, since it is larger than the sum of its proper divisors (1).

454198621 is an equidigital number, since it uses as much as digits as its factorization.

454198621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 454198621 is about 21311.9361157076. The cubic root of 454198621 is about 768.6853493475.

The spelling of 454198621 in words is "four hundred fifty-four million, one hundred ninety-eight thousand, six hundred twenty-one".