159728461 has 4 divisors (see below), whose sum is σ = 164881024. Its totient is φ = 154575900.

The previous prime is 159728417. The next prime is 159728479. The reversal of 159728461 is 164827951.

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 a de Polignac number, because none of the positive numbers 2^k-159728461 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 (159728411) 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, 2576235 + ... + 2576296.

It is an arithmetic number, because the mean of its divisors is an integer number (41220256).

Almost surely, 2^159728461 is an apocalyptic number.

It is an amenable number.

159728461 is a deficient number, since it is larger than the sum of its proper divisors (5152563).

159728461 is an equidigital number, since it uses as much as digits as its factorization.

159728461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5152562.

The product of its digits is 120960, while the sum is 43.

The square root of 159728461 is about 12638.3725613704. The cubic root of 159728461 is about 542.5762368173.

The spelling of 159728461 in words is "one hundred fifty-nine million, seven hundred twenty-eight thousand, four hundred sixty-one".