249500189 has 2 divisors, whose sum is σ = 249500190. Its totient is φ = 249500188.

The previous prime is 249500149. The next prime is 249500201. The reversal of 249500189 is 981005942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143760100 + 105740089 = 11990^2 + 10283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249500189 is a prime.

It is a super-2 number, since 2×249500189² = 124500688622071442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249500149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124750094 + 124750095.

It is an arithmetic number, because the mean of its divisors is an integer number (124750095).

Almost surely, 2^249500189 is an apocalyptic number.

It is an amenable number.

249500189 is a deficient number, since it is larger than the sum of its proper divisors (1).

249500189 is an equidigital number, since it uses as much as digits as its factorization.

249500189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 249500189 is about 15795.5749816206. The cubic root of 249500189 is about 629.5404299322.

The spelling of 249500189 in words is "two hundred forty-nine million, five hundred thousand, one hundred eighty-nine".