159609497 has 4 divisors (see below), whose sum is σ = 160626276. Its totient is φ = 158592720.

The previous prime is 159609493. The next prime is 159609503. The reversal of 159609497 is 794906951.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28987456 + 130622041 = 5384^2 + 11429^2 .

It is a cyclic number.

It is not a de Polignac number, because 159609497 - 2² = 159609493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159609493) 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, 508154 + ... + 508467.

It is an arithmetic number, because the mean of its divisors is an integer number (40156569).

Almost surely, 2^159609497 is an apocalyptic number.

It is an amenable number.

159609497 is a deficient number, since it is larger than the sum of its proper divisors (1016779).

159609497 is a wasteful number, since it uses less digits than its factorization.

159609497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016778.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 159609497 is about 12633.6652243124. The cubic root of 159609497 is about 542.4415017586.

The spelling of 159609497 in words is "one hundred fifty-nine million, six hundred nine thousand, four hundred ninety-seven".