231617149 has 2 divisors, whose sum is σ = 231617150. Its totient is φ = 231617148.

The previous prime is 231617137. The next prime is 231617161. The reversal of 231617149 is 941716132.

It is a balanced prime because it is at equal distance from previous prime (231617137) and next prime (231617161).

It can be written as a sum of positive squares in only one way, i.e., 121220100 + 110397049 = 11010^2 + 10507^2 .

It is a cyclic number.

It is not a de Polignac number, because 231617149 - 2²³ = 223228541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231617179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115808574 + 115808575.

It is an arithmetic number, because the mean of its divisors is an integer number (115808575).

Almost surely, 2^231617149 is an apocalyptic number.

It is an amenable number.

231617149 is a deficient number, since it is larger than the sum of its proper divisors (1).

231617149 is an equidigital number, since it uses as much as digits as its factorization.

231617149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 231617149 is about 15218.9733227968. The cubic root of 231617149 is about 614.1251791657.

The spelling of 231617149 in words is "two hundred thirty-one million, six hundred seventeen thousand, one hundred forty-nine".