164503723 has 4 divisors (see below), whose sum is σ = 165029608. Its totient is φ = 163977840.

The previous prime is 164503697. The next prime is 164503727. The reversal of 164503723 is 327305461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327305461 = 7 ⋅46757923.

It is a cyclic number.

It is not a de Polignac number, because 164503723 - 2⁹ = 164503211 is a prime.

It is a super-2 number, since 2×164503723² = 54122949761721458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164503727) 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 3 ways as a sum of consecutive naturals, for example, 262473 + ... + 263098.

It is an arithmetic number, because the mean of its divisors is an integer number (41257402).

Almost surely, 2^164503723 is an apocalyptic number.

164503723 is a deficient number, since it is larger than the sum of its proper divisors (525885).

164503723 is an equidigital number, since it uses as much as digits as its factorization.

164503723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525884.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 164503723 is about 12825.9004752103. The cubic root of 164503723 is about 547.9302073814.

The spelling of 164503723 in words is "one hundred sixty-four million, five hundred three thousand, seven hundred twenty-three".