159669961 has 4 divisors (see below), whose sum is σ = 174185424. Its totient is φ = 145154500.

The previous prime is 159669959. The next prime is 159669997. The reversal of 159669961 is 169966951.

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 159669961 - 2¹ = 159669959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159669899 and 159669908.

It is not an unprimeable number, because it can be changed into a prime (159669941) 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, 7257715 + ... + 7257736.

It is an arithmetic number, because the mean of its divisors is an integer number (43546356).

Almost surely, 2^159669961 is an apocalyptic number.

159669961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

159669961 is a deficient number, since it is larger than the sum of its proper divisors (14515463).

159669961 is a wasteful number, since it uses less digits than its factorization.

159669961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14515462.

The product of its digits is 787320, while the sum is 52.

The square root of 159669961 is about 12636.0579691611. The cubic root of 159669961 is about 542.5099898349.

The spelling of 159669961 in words is "one hundred fifty-nine million, six hundred sixty-nine thousand, nine hundred sixty-one".