254440189 has 2 divisors, whose sum is σ = 254440190. Its totient is φ = 254440188.

The previous prime is 254440169. The next prime is 254440201. The reversal of 254440189 is 981044452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248314564 + 6125625 = 15758^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 254440189 - 2⁷ = 254440061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254440129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127220094 + 127220095.

It is an arithmetic number, because the mean of its divisors is an integer number (127220095).

Almost surely, 2^254440189 is an apocalyptic number.

It is an amenable number.

254440189 is a deficient number, since it is larger than the sum of its proper divisors (1).

254440189 is an equidigital number, since it uses as much as digits as its factorization.

254440189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 254440189 is about 15951.1814295995. The cubic root of 254440189 is about 633.6681855931.

The spelling of 254440189 in words is "two hundred fifty-four million, four hundred forty thousand, one hundred eighty-nine".