159691087 has 4 divisors (see below), whose sum is σ = 161615160. Its totient is φ = 157767016.

The previous prime is 159691073. The next prime is 159691151. The reversal of 159691087 is 780196951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780196951 = 1223 ⋅637937.

It is a cyclic number.

It is not a de Polignac number, because 159691087 - 2⁷ = 159690959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159691027) 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 in 3 ways as a sum of consecutive naturals, for example, 961912 + ... + 962077.

It is an arithmetic number, because the mean of its divisors is an integer number (40403790).

Almost surely, 2^159691087 is an apocalyptic number.

159691087 is a deficient number, since it is larger than the sum of its proper divisors (1924073).

159691087 is an equidigital number, since it uses as much as digits as its factorization.

159691087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924072.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 159691087 is about 12636.8938825963. The cubic root of 159691087 is about 542.5339153551.

The spelling of 159691087 in words is "one hundred fifty-nine million, six hundred ninety-one thousand, eighty-seven".