249909653 has 12 divisors (see below), whose sum is σ = 293595372. Its totient is φ = 212083200.

The previous prime is 249909643. The next prime is 249909683. The reversal of 249909653 is 356909942.

It can be written as a sum of positive squares in 2 ways, for example, as 143448529 + 106461124 = 11977^2 + 10318^2 .

It is not a de Polignac number, because 249909653 - 2¹⁰ = 249908629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249909598 and 249909607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249909613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20300 + ... + 30197.

It is an arithmetic number, because the mean of its divisors is an integer number (24466281).

Almost surely, 2^249909653 is an apocalyptic number.

It is an amenable number.

249909653 is a deficient number, since it is larger than the sum of its proper divisors (43685719).

249909653 is a wasteful number, since it uses less digits than its factorization.

249909653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50612 (or 50605 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 249909653 is about 15808.5310196742. The cubic root of 249909653 is about 629.8846290794.

It can be divided in two parts, 24990 and 9653, that added together give a palindrome (34643).

The spelling of 249909653 in words is "two hundred forty-nine million, nine hundred nine thousand, six hundred fifty-three".