249404355269 has 2 divisors, whose sum is σ = 249404355270. Its totient is φ = 249404355268.

The previous prime is 249404355197. The next prime is 249404355281. The reversal of 249404355269 is 962553404942.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182019983044 + 67384372225 = 426638^2 + 259585^2 .

It is a cyclic number.

It is not a de Polignac number, because 249404355269 - 2³² = 245109387973 is a prime.

It is a super-2 number, since 2×249404355269² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 249404355269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249404355469) 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, 124702177634 + 124702177635.

It is an arithmetic number, because the mean of its divisors is an integer number (124702177635).

Almost surely, 2^249404355269 is an apocalyptic number.

It is an amenable number.

249404355269 is a deficient number, since it is larger than the sum of its proper divisors (1).

249404355269 is an equidigital number, since it uses as much as digits as its factorization.

249404355269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 53.

Subtracting from 249404355269 its sum of digits (53), we obtain a square (249404355216 = 499404²).

The spelling of 249404355269 in words is "two hundred forty-nine billion, four hundred four million, three hundred fifty-five thousand, two hundred sixty-nine".