202123023 has 4 divisors (see below), whose sum is σ = 269497368. Its totient is φ = 134748680.

The previous prime is 202122959. The next prime is 202123027. The reversal of 202123023 is 320321202.

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 202123023 - 2⁶ = 202122959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202122993 and 202123011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202123027) 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, 33687168 + ... + 33687173.

It is an arithmetic number, because the mean of its divisors is an integer number (67374342).

Almost surely, 2^202123023 is an apocalyptic number.

202123023 is a deficient number, since it is larger than the sum of its proper divisors (67374345).

202123023 is an equidigital number, since it uses as much as digits as its factorization.

202123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67374344.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 202123023 is about 14216.9976788350. The cubic root of 202123023 is about 586.8655210378.

Adding to 202123023 its reverse (320321202), we get a palindrome (522444225).

The spelling of 202123023 in words is "two hundred two million, one hundred twenty-three thousand, twenty-three".