235563661 has 2 divisors, whose sum is σ = 235563662. Its totient is φ = 235563660.

The previous prime is 235563623. The next prime is 235563667. The reversal of 235563661 is 166365532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148962025 + 86601636 = 12205^2 + 9306^2 .

It is a cyclic number.

It is not a de Polignac number, because 235563661 - 2⁷ = 235563533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 235563661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235563667) 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, 117781830 + 117781831.

It is an arithmetic number, because the mean of its divisors is an integer number (117781831).

Almost surely, 2^235563661 is an apocalyptic number.

It is an amenable number.

235563661 is a deficient number, since it is larger than the sum of its proper divisors (1).

235563661 is an equidigital number, since it uses as much as digits as its factorization.

235563661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 37.

The square root of 235563661 is about 15348.0833005297. The cubic root of 235563661 is about 617.5935690627.

The spelling of 235563661 in words is "two hundred thirty-five million, five hundred sixty-three thousand, six hundred sixty-one".