254143909 has 2 divisors, whose sum is σ = 254143910. Its totient is φ = 254143908.

The previous prime is 254143853. The next prime is 254143927. The reversal of 254143909 is 909341452.

254143909 = T₁₃₀₁₅ + T₁₃₀₁₆ + T₁₃₀₁₇.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160731684 + 93412225 = 12678^2 + 9665^2 .

It is a cyclic number.

It is not a de Polignac number, because 254143909 - 2⁷ = 254143781 is a prime.

It is equal to p_13893463 and since 254143909 and 13893463 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254143949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127071954 + 127071955.

It is an arithmetic number, because the mean of its divisors is an integer number (127071955).

Almost surely, 2^254143909 is an apocalyptic number.

254143909 is the 13017-th centered triangular number.

It is an amenable number.

254143909 is a deficient number, since it is larger than the sum of its proper divisors (1).

254143909 is an equidigital number, since it uses as much as digits as its factorization.

254143909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 254143909 is about 15941.8916380711. The cubic root of 254143909 is about 633.4221341474.

The spelling of 254143909 in words is "two hundred fifty-four million, one hundred forty-three thousand, nine hundred nine".