164981599 has 8 divisors (see below), whose sum is σ = 172339200. Its totient is φ = 157639416.

The previous prime is 164981587. The next prime is 164981627. The reversal of 164981599 is 995189461.

It is a happy number.

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 164981599 - 2¹³ = 164973407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164981519) 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, 21702 + ... + 28300.

It is an arithmetic number, because the mean of its divisors is an integer number (21542400).

Almost surely, 2^164981599 is an apocalyptic number.

164981599 is a deficient number, since it is larger than the sum of its proper divisors (7357601).

164981599 is a wasteful number, since it uses less digits than its factorization.

164981599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709.

The product of its digits is 699840, while the sum is 52.

The square root of 164981599 is about 12844.5163007410. The cubic root of 164981599 is about 548.4602654094.

The spelling of 164981599 in words is "one hundred sixty-four million, nine hundred eighty-one thousand, five hundred ninety-nine".