164617994 has 4 divisors (see below), whose sum is σ = 246926994. Its totient is φ = 82308996.

The previous prime is 164617991. The next prime is 164618011. The reversal of 164617994 is 499716461.

164617994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149695225 + 14922769 = 12235^2 + 3863^2 .

It is not an unprimeable number, because it can be changed into a prime (164617991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41154497 + ... + 41154500.

Almost surely, 2^164617994 is an apocalyptic number.

164617994 is a deficient number, since it is larger than the sum of its proper divisors (82309000).

164617994 is an equidigital number, since it uses as much as digits as its factorization.

164617994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82308999.

The product of its digits is 326592, while the sum is 47.

The square root of 164617994 is about 12830.3543988465. The cubic root of 164617994 is about 548.0570495777.

The spelling of 164617994 in words is "one hundred sixty-four million, six hundred seventeen thousand, nine hundred ninety-four".