654054221 has 2 divisors, whose sum is σ = 654054222. Its totient is φ = 654054220.

The previous prime is 654054199. The next prime is 654054251. The reversal of 654054221 is 122450456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637562500 + 16491721 = 25250^2 + 4061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654054221 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654054251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327027110 + 327027111.

It is an arithmetic number, because the mean of its divisors is an integer number (327027111).

Almost surely, 2^654054221 is an apocalyptic number.

It is an amenable number.

654054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

654054221 is an equidigital number, since it uses as much as digits as its factorization.

654054221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 654054221 is about 25574.4837875567. The cubic root of 654054221 is about 868.0363609146.

The spelling of 654054221 in words is "six hundred fifty-four million, fifty-four thousand, two hundred twenty-one".