164838986 has 16 divisors (see below), whose sum is σ = 266880264. Its totient is φ = 75907584.

The previous prime is 164838977. The next prime is 164839007. The reversal of 164838986 is 689838461.

It can be written as a sum of positive squares in 4 ways, for example, as 139688761 + 25150225 = 11819^2 + 5015^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4946 + ... + 18818.

Almost surely, 2^164838986 is an apocalyptic number.

164838986 is a deficient number, since it is larger than the sum of its proper divisors (102041278).

164838986 is a wasteful number, since it uses less digits than its factorization.

164838986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14345.

The product of its digits is 1990656, while the sum is 53.

The square root of 164838986 is about 12838.9635874552. The cubic root of 164838986 is about 548.3021869476.

The spelling of 164838986 in words is "one hundred sixty-four million, eight hundred thirty-eight thousand, nine hundred eighty-six".