243101149 has 2 divisors, whose sum is σ = 243101150. Its totient is φ = 243101148.

The previous prime is 243101129. The next prime is 243101179. The reversal of 243101149 is 941101342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156425049 + 86676100 = 12507^2 + 9310^2 .

It is a cyclic number.

It is not a de Polignac number, because 243101149 - 2⁷ = 243101021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243101129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121550574 + 121550575.

It is an arithmetic number, because the mean of its divisors is an integer number (121550575).

Almost surely, 2^243101149 is an apocalyptic number.

It is an amenable number.

243101149 is a deficient number, since it is larger than the sum of its proper divisors (1).

243101149 is an equidigital number, since it uses as much as digits as its factorization.

243101149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 243101149 is about 15591.7012862612. The cubic root of 243101149 is about 624.1117186080. Note that the first 3 decimals are identical.

The spelling of 243101149 in words is "two hundred forty-three million, one hundred one thousand, one hundred forty-nine".