159731449 has 8 divisors (see below), whose sum is σ = 169270920. Its totient is φ = 150460800.

The previous prime is 159731413. The next prime is 159731471. The reversal of 159731449 is 944137951.

It can be written as a sum of positive squares in 4 ways, for example, as 10036224 + 149695225 = 3168^2 + 12235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159731449 - 2⁹ = 159730937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159731749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65982 + ... + 68359.

It is an arithmetic number, because the mean of its divisors is an integer number (21158865).

Almost surely, 2^159731449 is an apocalyptic number.

It is an amenable number.

159731449 is a deficient number, since it is larger than the sum of its proper divisors (9539471).

159731449 is a wasteful number, since it uses less digits than its factorization.

159731449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134411.

The product of its digits is 136080, while the sum is 43.

The square root of 159731449 is about 12638.4907722402. The cubic root of 159731449 is about 542.5796200751.

The spelling of 159731449 in words is "one hundred fifty-nine million, seven hundred thirty-one thousand, four hundred forty-nine".