153997241 has 2 divisors, whose sum is σ = 153997242. Its totient is φ = 153997240.

The previous prime is 153997231. The next prime is 153997301. The reversal of 153997241 is 142799351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151191616 + 2805625 = 12296^2 + 1675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153997241 is a prime.

It is a super-2 number, since 2×153997241² = 47430300471224162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (153997201) 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, 76998620 + 76998621.

It is an arithmetic number, because the mean of its divisors is an integer number (76998621).

Almost surely, 2^153997241 is an apocalyptic number.

It is an amenable number.

153997241 is a deficient number, since it is larger than the sum of its proper divisors (1).

153997241 is an equidigital number, since it uses as much as digits as its factorization.

153997241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 153997241 is about 12409.5624822151. The cubic root of 153997241 is about 536.0076400949.

The spelling of 153997241 in words is "one hundred fifty-three million, nine hundred ninety-seven thousand, two hundred forty-one".