164646723 has 8 divisors (see below), whose sum is σ = 231083200. Its totient is φ = 103987368.

The previous prime is 164646697. The next prime is 164646749. The reversal of 164646723 is 327646461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (164646697) and next prime (164646749).

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

It is not a de Polignac number, because 164646723 - 2⁸ = 164646467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164646773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444213 + ... + 1444326.

It is an arithmetic number, because the mean of its divisors is an integer number (28885400).

Almost surely, 2^164646723 is an apocalyptic number.

164646723 is a deficient number, since it is larger than the sum of its proper divisors (66436477).

164646723 is a wasteful number, since it uses less digits than its factorization.

164646723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888561.

The product of its digits is 145152, while the sum is 39.

The square root of 164646723 is about 12831.4739215727. The cubic root of 164646723 is about 548.0889298818.

The spelling of 164646723 in words is "one hundred sixty-four million, six hundred forty-six thousand, seven hundred twenty-three".