168501939 has 8 divisors (see below), whose sum is σ = 224748432. Its totient is φ = 112295040.

The previous prime is 168501911. The next prime is 168501941. The reversal of 168501939 is 939105861.

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

It is not a de Polignac number, because 168501939 - 2¹⁶ = 168436403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168501939.

It is not an unprimeable number, because it can be changed into a prime (168501989) 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, 2119 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (28093554).

Almost surely, 2^168501939 is an apocalyptic number.

168501939 is a deficient number, since it is larger than the sum of its proper divisors (56246493).

168501939 is a wasteful number, since it uses less digits than its factorization.

168501939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19797.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 168501939 is about 12980.8296730217. The cubic root of 168501939 is about 552.3338173310. Note that the first 3 decimals are identical.

The spelling of 168501939 in words is "one hundred sixty-eight million, five hundred one thousand, nine hundred thirty-nine".