201173123 has 4 divisors (see below), whose sum is σ = 201352440. Its totient is φ = 200993808.

The previous prime is 201173057. The next prime is 201173131. The reversal of 201173123 is 321371102.

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

It is a cyclic number.

It is not a de Polignac number, because 201173123 - 2¹⁶ = 201107587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201173095 and 201173104.

It is not an unprimeable number, because it can be changed into a prime (201173153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87965 + ... + 90222.

It is an arithmetic number, because the mean of its divisors is an integer number (50338110).

Almost surely, 2^201173123 is an apocalyptic number.

201173123 is a deficient number, since it is larger than the sum of its proper divisors (179317).

201173123 is a wasteful number, since it uses less digits than its factorization.

201173123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179316.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 201173123 is about 14183.5511420800. The cubic root of 201173123 is about 585.9447301171.

The spelling of 201173123 in words is "two hundred one million, one hundred seventy-three thousand, one hundred twenty-three".