254578109 has 2 divisors, whose sum is σ = 254578110. Its totient is φ = 254578108.

The previous prime is 254578087. The next prime is 254578117. The reversal of 254578109 is 901875452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201725209 + 52852900 = 14203^2 + 7270^2 .

It is a cyclic number.

It is not a de Polignac number, because 254578109 - 2¹² = 254574013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254578139) 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, 127289054 + 127289055.

It is an arithmetic number, because the mean of its divisors is an integer number (127289055).

Almost surely, 2^254578109 is an apocalyptic number.

It is an amenable number.

254578109 is a deficient number, since it is larger than the sum of its proper divisors (1).

254578109 is an equidigital number, since it uses as much as digits as its factorization.

254578109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 254578109 is about 15955.5040346584. The cubic root of 254578109 is about 633.7826587695.

The spelling of 254578109 in words is "two hundred fifty-four million, five hundred seventy-eight thousand, one hundred nine".