159659421 has 4 divisors (see below), whose sum is σ = 212879232. Its totient is φ = 106439612.

The previous prime is 159659419. The next prime is 159659441. The reversal of 159659421 is 124956951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 159659421 - 2¹ = 159659419 is a prime.

It is a super-2 number, since 2×159659421² = 50982261428110482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159659441) 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, 26609901 + ... + 26609906.

It is an arithmetic number, because the mean of its divisors is an integer number (53219808).

Almost surely, 2^159659421 is an apocalyptic number.

It is an amenable number.

159659421 is a deficient number, since it is larger than the sum of its proper divisors (53219811).

159659421 is an equidigital number, since it uses as much as digits as its factorization.

159659421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53219810.

The product of its digits is 97200, while the sum is 42.

The square root of 159659421 is about 12635.6409018300. The cubic root of 159659421 is about 542.4980523336.

The spelling of 159659421 in words is "one hundred fifty-nine million, six hundred fifty-nine thousand, four hundred twenty-one".