554394821 has 2 divisors, whose sum is σ = 554394822. Its totient is φ = 554394820.

The previous prime is 554394761. The next prime is 554394833. The reversal of 554394821 is 128493455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529644196 + 24750625 = 23014^2 + 4975^2 .

It is a cyclic number.

It is not a de Polignac number, because 554394821 - 2²² = 550200517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554394851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277197410 + 277197411.

It is an arithmetic number, because the mean of its divisors is an integer number (277197411).

Almost surely, 2^554394821 is an apocalyptic number.

It is an amenable number.

554394821 is a deficient number, since it is larger than the sum of its proper divisors (1).

554394821 is an equidigital number, since it uses as much as digits as its factorization.

554394821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 41.

The square root of 554394821 is about 23545.5902665446. The cubic root of 554394821 is about 821.4977687361.

The spelling of 554394821 in words is "five hundred fifty-four million, three hundred ninety-four thousand, eight hundred twenty-one".