159007661 has 2 divisors, whose sum is σ = 159007662. Its totient is φ = 159007660.

The previous prime is 159007643. The next prime is 159007733. The reversal of 159007661 is 166700951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131905225 + 27102436 = 11485^2 + 5206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159007661 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (159007621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79503830 + 79503831.

It is an arithmetic number, because the mean of its divisors is an integer number (79503831).

Almost surely, 2^159007661 is an apocalyptic number.

It is an amenable number.

159007661 is a deficient number, since it is larger than the sum of its proper divisors (1).

159007661 is an equidigital number, since it uses as much as digits as its factorization.

159007661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 159007661 is about 12609.8239876693. The cubic root of 159007661 is about 541.7588522970.

The spelling of 159007661 in words is "one hundred fifty-nine million, seven thousand, six hundred sixty-one".