168939594 has 20 divisors (see below), whose sum is σ = 378550194. Its totient is φ = 56313144.

The previous prime is 168939571. The next prime is 168939607. The reversal of 168939594 is 495939861.

168939594 is a `hidden beast` number, since 16 + 8 + 9 + 39 + 594 = 666.

It can be written as a sum of positive squares in only one way, i.e., 104346225 + 64593369 = 10215^2 + 8037^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168939594.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 521257 + ... + 521580.

Almost surely, 2^168939594 is an apocalyptic number.

168939594 is an abundant number, since it is smaller than the sum of its proper divisors (209610600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168939594 is a wasteful number, since it uses less digits than its factorization.

168939594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042851 (or 1042842 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 168939594 is about 12997.6764846645. The cubic root of 168939594 is about 552.8116014922.

The spelling of 168939594 in words is "one hundred sixty-eight million, nine hundred thirty-nine thousand, five hundred ninety-four".