159013661 has 2 divisors, whose sum is σ = 159013662. Its totient is φ = 159013660.

The previous prime is 159013627. The next prime is 159013667. The reversal of 159013661 is 166310951.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100200100 + 58813561 = 10010^2 + 7669^2 .

It is a cyclic number.

It is not a de Polignac number, because 159013661 - 2²⁶ = 91904797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159013667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79506830 + 79506831.

It is an arithmetic number, because the mean of its divisors is an integer number (79506831).

Almost surely, 2^159013661 is an apocalyptic number.

It is an amenable number.

159013661 is a deficient number, since it is larger than the sum of its proper divisors (1).

159013661 is an equidigital number, since it uses as much as digits as its factorization.

159013661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 159013661 is about 12610.0618951693. The cubic root of 159013661 is about 541.7656664597.

It can be divided in two parts, 1590 and 13661, that added together give a palindrome (15251).

The spelling of 159013661 in words is "one hundred fifty-nine million, thirteen thousand, six hundred sixty-one".