254220689 has 2 divisors, whose sum is σ = 254220690. Its totient is φ = 254220688.

The previous prime is 254220667. The next prime is 254220691. The reversal of 254220689 is 986022452.

254220689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154380625 + 99840064 = 12425^2 + 9992^2 .

It is a cyclic number.

It is not a de Polignac number, because 254220689 - 2⁸ = 254220433 is a prime.

It is a Sophie Germain prime.

Together with 254220691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (254220619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127110344 + 127110345.

It is an arithmetic number, because the mean of its divisors is an integer number (127110345).

Almost surely, 2^254220689 is an apocalyptic number.

It is an amenable number.

254220689 is a deficient number, since it is larger than the sum of its proper divisors (1).

254220689 is an equidigital number, since it uses as much as digits as its factorization.

254220689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 254220689 is about 15944.2995769648. The cubic root of 254220689 is about 633.4859159300.

The spelling of 254220689 in words is "two hundred fifty-four million, two hundred twenty thousand, six hundred eighty-nine".