249857273 has 2 divisors, whose sum is σ = 249857274. Its totient is φ = 249857272.

The previous prime is 249857249. The next prime is 249857291. The reversal of 249857273 is 372758942.

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., 247999504 + 1857769 = 15748^2 + 1363^2 .

It is a cyclic number.

It is not a de Polignac number, because 249857273 - 2⁸ = 249857017 is a prime.

It is not a weakly prime, because it can be changed into another prime (249857213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124928636 + 124928637.

It is an arithmetic number, because the mean of its divisors is an integer number (124928637).

Almost surely, 2^249857273 is an apocalyptic number.

It is an amenable number.

249857273 is a deficient number, since it is larger than the sum of its proper divisors (1).

249857273 is an equidigital number, since it uses as much as digits as its factorization.

249857273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 249857273 is about 15806.8742324344. The cubic root of 249857273 is about 629.8406189583.

The spelling of 249857273 in words is "two hundred forty-nine million, eight hundred fifty-seven thousand, two hundred seventy-three".