249435887 has 2 divisors, whose sum is σ = 249435888. Its totient is φ = 249435886.

The previous prime is 249435871. The next prime is 249435929. The reversal of 249435887 is 788534942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249435887 - 2⁴ = 249435871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249435187) 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, 124717943 + 124717944.

It is an arithmetic number, because the mean of its divisors is an integer number (124717944).

Almost surely, 2^249435887 is an apocalyptic number.

249435887 is a deficient number, since it is larger than the sum of its proper divisors (1).

249435887 is an equidigital number, since it uses as much as digits as its factorization.

249435887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 50.

The square root of 249435887 is about 15793.5394069854. The cubic root of 249435887 is about 629.4863428832.

The spelling of 249435887 in words is "two hundred forty-nine million, four hundred thirty-five thousand, eight hundred eighty-seven".