249083869 has 2 divisors, whose sum is σ = 249083870. Its totient is φ = 249083868.

The previous prime is 249083851. The next prime is 249083873. The reversal of 249083869 is 968380942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245705625 + 3378244 = 15675^2 + 1838^2 .

It is a cyclic number.

It is not a de Polignac number, because 249083869 - 2¹³ = 249075677 is a prime.

It is a super-2 number, since 2×249083869² = 124085547592018322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249086869) 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, 124541934 + 124541935.

It is an arithmetic number, because the mean of its divisors is an integer number (124541935).

Almost surely, 2^249083869 is an apocalyptic number.

It is an amenable number.

249083869 is a deficient number, since it is larger than the sum of its proper divisors (1).

249083869 is an equidigital number, since it uses as much as digits as its factorization.

249083869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 249083869 is about 15782.3911052793. The cubic root of 249083869 is about 629.1900812556.

The spelling of 249083869 in words is "two hundred forty-nine million, eighty-three thousand, eight hundred sixty-nine".