249945697 has 2 divisors, whose sum is σ = 249945698. Its totient is φ = 249945696.

The previous prime is 249945673. The next prime is 249945719. The reversal of 249945697 is 796549942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209699361 + 40246336 = 14481^2 + 6344^2 .

It is a cyclic number.

It is not a de Polignac number, because 249945697 - 2⁷ = 249945569 is a prime.

It is not a weakly prime, because it can be changed into another prime (249945637) 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, 124972848 + 124972849.

It is an arithmetic number, because the mean of its divisors is an integer number (124972849).

Almost surely, 2^249945697 is an apocalyptic number.

It is an amenable number.

249945697 is a deficient number, since it is larger than the sum of its proper divisors (1).

249945697 is an equidigital number, since it uses as much as digits as its factorization.

249945697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 55.

The square root of 249945697 is about 15809.6709959442. The cubic root of 249945697 is about 629.9149099827.

The spelling of 249945697 in words is "two hundred forty-nine million, nine hundred forty-five thousand, six hundred ninety-seven".