254401999 has 2 divisors, whose sum is σ = 254402000. Its totient is φ = 254401998.

The previous prime is 254401981. The next prime is 254402021. The reversal of 254401999 is 999104452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254401999 - 2¹⁵ = 254369231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254401969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127200999 + 127201000.

It is an arithmetic number, because the mean of its divisors is an integer number (127201000).

Almost surely, 2^254401999 is an apocalyptic number.

254401999 is a deficient number, since it is larger than the sum of its proper divisors (1).

254401999 is an equidigital number, since it uses as much as digits as its factorization.

254401999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 254401999 is about 15949.9842946631. The cubic root of 254401999 is about 633.6364806976.

The spelling of 254401999 in words is "two hundred fifty-four million, four hundred one thousand, nine hundred ninety-nine".