164907994 has 4 divisors (see below), whose sum is σ = 247361994. Its totient is φ = 82453996.

The previous prime is 164907989. The next prime is 164908013. The reversal of 164907994 is 499709461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499709461 = 3541 ⋅141121.

It can be written as a sum of positive squares in only one way, i.e., 123498769 + 41409225 = 11113^2 + 6435^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41226997 + ... + 41227000.

Almost surely, 2^164907994 is an apocalyptic number.

164907994 is a deficient number, since it is larger than the sum of its proper divisors (82454000).

164907994 is an equidigital number, since it uses as much as digits as its factorization.

164907994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82453999.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 164907994 is about 12841.6507505850. The cubic root of 164907994 is about 548.3786898013.

The spelling of 164907994 in words is "one hundred sixty-four million, nine hundred seven thousand, nine hundred ninety-four".