181849253 has 2 divisors, whose sum is σ = 181849254. Its totient is φ = 181849252.

The previous prime is 181849207. The next prime is 181849267. The reversal of 181849253 is 352948181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162996289 + 18852964 = 12767^2 + 4342^2 .

It is an emirp because it is prime and its reverse (352948181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181849253 - 2¹⁶ = 181783717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181849253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181849453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90924626 + 90924627.

It is an arithmetic number, because the mean of its divisors is an integer number (90924627).

Almost surely, 2^181849253 is an apocalyptic number.

It is an amenable number.

181849253 is a deficient number, since it is larger than the sum of its proper divisors (1).

181849253 is an equidigital number, since it uses as much as digits as its factorization.

181849253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 181849253 is about 13485.1493503038. The cubic root of 181849253 is about 566.5486040467.

The spelling of 181849253 in words is "one hundred eighty-one million, eight hundred forty-nine thousand, two hundred fifty-three".