249838769 has 2 divisors, whose sum is σ = 249838770. Its totient is φ = 249838768.

The previous prime is 249838759. The next prime is 249838781. The reversal of 249838769 is 967838942.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230584225 + 19254544 = 15185^2 + 4388^2 .

It is a cyclic number.

It is not a de Polignac number, because 249838769 - 2²⁰ = 248790193 is a prime.

It is a super-2 number, since 2×249838769² = 124838820990870722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249838759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124919384 + 124919385.

It is an arithmetic number, because the mean of its divisors is an integer number (124919385).

Almost surely, 2^249838769 is an apocalyptic number.

It is an amenable number.

249838769 is a deficient number, since it is larger than the sum of its proper divisors (1).

249838769 is an equidigital number, since it uses as much as digits as its factorization.

249838769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The square root of 249838769 is about 15806.2889066346. The cubic root of 249838769 is about 629.8250702701.

The spelling of 249838769 in words is "two hundred forty-nine million, eight hundred thirty-eight thousand, seven hundred sixty-nine".