159361921 has 4 divisors (see below), whose sum is σ = 160316352. Its totient is φ = 158407492.

The previous prime is 159361903. The next prime is 159361933. The reversal of 159361921 is 129163951.

It is a happy number.

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 159361921 - 2²¹ = 157264769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159361901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476965 + ... + 477298.

It is an arithmetic number, because the mean of its divisors is an integer number (40079088).

Almost surely, 2^159361921 is an apocalyptic number.

It is an amenable number.

159361921 is a deficient number, since it is larger than the sum of its proper divisors (954431).

159361921 is an equidigital number, since it uses as much as digits as its factorization.

159361921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954430.

The product of its digits is 14580, while the sum is 37.

The square root of 159361921 is about 12623.8631567361. The cubic root of 159361921 is about 542.1608898140.

The spelling of 159361921 in words is "one hundred fifty-nine million, three hundred sixty-one thousand, nine hundred twenty-one".