249895493 has 2 divisors, whose sum is σ = 249895494. Its totient is φ = 249895492.

The previous prime is 249895439. The next prime is 249895501. The reversal of 249895493 is 394598942.

249895493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (249895439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232196644 + 17698849 = 15238^2 + 4207^2 .

It is a cyclic number.

It is not a de Polignac number, because 249895493 - 2²² = 245701189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249894493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124947746 + 124947747.

It is an arithmetic number, because the mean of its divisors is an integer number (124947747).

Almost surely, 2^249895493 is an apocalyptic number.

It is an amenable number.

249895493 is a deficient number, since it is larger than the sum of its proper divisors (1).

249895493 is an equidigital number, since it uses as much as digits as its factorization.

249895493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 53.

The square root of 249895493 is about 15808.0831538805. The cubic root of 249895493 is about 629.8727323336.

The spelling of 249895493 in words is "two hundred forty-nine million, eight hundred ninety-five thousand, four hundred ninety-three".