153964661 has 2 divisors, whose sum is σ = 153964662. Its totient is φ = 153964660.

The previous prime is 153964651. The next prime is 153964667. The reversal of 153964661 is 166469351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90364036 + 63600625 = 9506^2 + 7975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153964661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153964667) 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, 76982330 + 76982331.

It is an arithmetic number, because the mean of its divisors is an integer number (76982331).

Almost surely, 2^153964661 is an apocalyptic number.

It is an amenable number.

153964661 is a deficient number, since it is larger than the sum of its proper divisors (1).

153964661 is an equidigital number, since it uses as much as digits as its factorization.

153964661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 153964661 is about 12408.2497154111. The cubic root of 153964661 is about 535.9698377714.

The spelling of 153964661 in words is "one hundred fifty-three million, nine hundred sixty-four thousand, six hundred sixty-one".