164723392903 has 4 divisors (see below), whose sum is σ = 164769680080. Its totient is φ = 164677105728.

The previous prime is 164723392891. The next prime is 164723392907. The reversal of 164723392903 is 309293327461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309293327461 = 185539 ⋅1666999.

It is a cyclic number.

It is not a de Polignac number, because 164723392903 - 2²⁹ = 164186521991 is a prime.

It is a super-2 number, since 2×164723392903² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164723392907) 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 in 3 ways as a sum of consecutive naturals, for example, 23138250 + ... + 23145367.

It is an arithmetic number, because the mean of its divisors is an integer number (41192420020).

Almost surely, 2^164723392903 is an apocalyptic number.

164723392903 is a deficient number, since it is larger than the sum of its proper divisors (46287177).

164723392903 is an equidigital number, since it uses as much as digits as its factorization.

164723392903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46287176.

The product of its (nonzero) digits is 1469664, while the sum is 49.

The spelling of 164723392903 in words is "one hundred sixty-four billion, seven hundred twenty-three million, three hundred ninety-two thousand, nine hundred three".