153442661 has 2 divisors, whose sum is σ = 153442662. Its totient is φ = 153442660.

The previous prime is 153442649. The next prime is 153442669. The reversal of 153442661 is 166244351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108472225 + 44970436 = 10415^2 + 6706^2 .

It is a cyclic number.

It is not a de Polignac number, because 153442661 - 2¹⁴ = 153426277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153442669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76721330 + 76721331.

It is an arithmetic number, because the mean of its divisors is an integer number (76721331).

Almost surely, 2^153442661 is an apocalyptic number.

It is an amenable number.

153442661 is a deficient number, since it is larger than the sum of its proper divisors (1).

153442661 is an equidigital number, since it uses as much as digits as its factorization.

153442661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 153442661 is about 12387.1974635105. The cubic root of 153442661 is about 535.3634366363.

The spelling of 153442661 in words is "one hundred fifty-three million, four hundred forty-two thousand, six hundred sixty-one".