249827129 has 2 divisors, whose sum is σ = 249827130. Its totient is φ = 249827128.

The previous prime is 249827117. The next prime is 249827153. The reversal of 249827129 is 921728942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217621504 + 32205625 = 14752^2 + 5675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249827129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249827129.

It is not a weakly prime, because it can be changed into another prime (249827429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124913564 + 124913565.

It is an arithmetic number, because the mean of its divisors is an integer number (124913565).

Almost surely, 2^249827129 is an apocalyptic number.

It is an amenable number.

249827129 is a deficient number, since it is larger than the sum of its proper divisors (1).

249827129 is an equidigital number, since it uses as much as digits as its factorization.

249827129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 249827129 is about 15805.9206944740. The cubic root of 249827129 is about 629.8152889250.

The spelling of 249827129 in words is "two hundred forty-nine million, eight hundred twenty-seven thousand, one hundred twenty-nine".