159919491 has 8 divisors (see below), whose sum is σ = 216721744. Its totient is φ = 104865120.

The previous prime is 159919481. The next prime is 159919499. The reversal of 159919491 is 194919951.

It is a happy number.

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

It is not a de Polignac number, because 159919491 - 2⁷ = 159919363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159919491.

It is not an unprimeable number, because it can be changed into a prime (159919499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436756 + ... + 437121.

It is an arithmetic number, because the mean of its divisors is an integer number (27090218).

Almost surely, 2^159919491 is an apocalyptic number.

159919491 is a deficient number, since it is larger than the sum of its proper divisors (56802253).

159919491 is an equidigital number, since it uses as much as digits as its factorization.

159919491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873941.

The product of its digits is 131220, while the sum is 48.

The square root of 159919491 is about 12645.9278425903. The cubic root of 159919491 is about 542.7924517722.

The spelling of 159919491 in words is "one hundred fifty-nine million, nine hundred nineteen thousand, four hundred ninety-one".