249739201 has 2 divisors, whose sum is σ = 249739202. Its totient is φ = 249739200.

The previous prime is 249739187. The next prime is 249739223. The reversal of 249739201 is 102937942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249671601 + 67600 = 15801^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 249739201 - 2¹¹ = 249737153 is a prime.

It is a super-2 number, since 2×249739201² = 124739337032236802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249739291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124869600 + 124869601.

It is an arithmetic number, because the mean of its divisors is an integer number (124869601).

Almost surely, 2^249739201 is an apocalyptic number.

It is an amenable number.

249739201 is a deficient number, since it is larger than the sum of its proper divisors (1).

249739201 is an equidigital number, since it uses as much as digits as its factorization.

249739201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 249739201 is about 15803.1389603458. The cubic root of 249739201 is about 629.7413912967.

The spelling of 249739201 in words is "two hundred forty-nine million, seven hundred thirty-nine thousand, two hundred one".