164893138 has 8 divisors (see below), whose sum is σ = 247758588. Its totient is φ = 82306944.

The previous prime is 164893111. The next prime is 164893147. The reversal of 164893138 is 831398461.

It can be written as a sum of positive squares in 2 ways, for example, as 162741049 + 2152089 = 12757^2 + 1467^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 164893094 and 164893103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68331 + ... + 70702.

Almost surely, 2^164893138 is an apocalyptic number.

164893138 is a deficient number, since it is larger than the sum of its proper divisors (82865450).

164893138 is a wasteful number, since it uses less digits than its factorization.

164893138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139628.

The product of its digits is 124416, while the sum is 43.

The square root of 164893138 is about 12841.0723072491. The cubic root of 164893138 is about 548.3622221168.

The spelling of 164893138 in words is "one hundred sixty-four million, eight hundred ninety-three thousand, one hundred thirty-eight".