164129986 has 8 divisors (see below), whose sum is σ = 246280464. Its totient is φ = 82036500.

The previous prime is 164129983. The next prime is 164129993. The reversal of 164129986 is 689921461.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (164129981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (30785058).

Almost surely, 2^164129986 is an apocalyptic number.

164129986 is a deficient number, since it is larger than the sum of its proper divisors (82150478).

164129986 is a wasteful number, since it uses less digits than its factorization.

164129986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28496.

The product of its digits is 186624, while the sum is 46.

The square root of 164129986 is about 12811.3225702891. The cubic root of 164129986 is about 547.5149440956.

The spelling of 164129986 in words is "one hundred sixty-four million, one hundred twenty-nine thousand, nine hundred eighty-six".