254495987 has 2 divisors, whose sum is σ = 254495988. Its totient is φ = 254495986.

The previous prime is 254495981. The next prime is 254495999. The reversal of 254495987 is 789594452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254495987 - 2⁴ = 254495971 is a prime.

It is not a weakly prime, because it can be changed into another prime (254495981) 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, 127247993 + 127247994.

It is an arithmetic number, because the mean of its divisors is an integer number (127247994).

Almost surely, 2^254495987 is an apocalyptic number.

254495987 is a deficient number, since it is larger than the sum of its proper divisors (1).

254495987 is an equidigital number, since it uses as much as digits as its factorization.

254495987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 53.

The square root of 254495987 is about 15952.9303577744. The cubic root of 254495987 is about 633.7145027430.

The spelling of 254495987 in words is "two hundred fifty-four million, four hundred ninety-five thousand, nine hundred eighty-seven".