159213923 has 16 divisors (see below), whose sum is σ = 184151040. Its totient is φ = 136274400.

The previous prime is 159213917. The next prime is 159213937. The reversal of 159213923 is 329312951.

It is a Cunningham number, because it is equal to 12618²-1.

It is a cyclic number.

It is not a de Polignac number, because 159213923 - 2²² = 155019619 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159213623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6308 + ... + 18926.

It is an arithmetic number, because the mean of its divisors is an integer number (11509440).

Almost surely, 2^159213923 is an apocalyptic number.

159213923 is a deficient number, since it is larger than the sum of its proper divisors (24937117).

159213923 is a wasteful number, since it uses less digits than its factorization.

159213923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12698.

The product of its digits is 14580, while the sum is 35.

The square root of 159213923 is about 12617.9999603741. Note that the first 4 decimals coincide. The cubic root of 159213923 is about 541.9930044984.

The spelling of 159213923 in words is "one hundred fifty-nine million, two hundred thirteen thousand, nine hundred twenty-three".