232705661 has 2 divisors, whose sum is σ = 232705662. Its totient is φ = 232705660.

The previous prime is 232705643. The next prime is 232705663. The reversal of 232705661 is 166507232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132825625 + 99880036 = 11525^2 + 9994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232705661 is a prime.

It is a super-2 number, since 2×232705661² = 108303849322893842, which contains 22 as substring.

Together with 232705663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232705663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116352830 + 116352831.

It is an arithmetic number, because the mean of its divisors is an integer number (116352831).

Almost surely, 2^232705661 is an apocalyptic number.

It is an amenable number.

232705661 is a deficient number, since it is larger than the sum of its proper divisors (1).

232705661 is an equidigital number, since it uses as much as digits as its factorization.

232705661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 232705661 is about 15254.6930811472. The cubic root of 232705661 is about 615.0857271379.

The spelling of 232705661 in words is "two hundred thirty-two million, seven hundred five thousand, six hundred sixty-one".