206123023 has 2 divisors, whose sum is σ = 206123024. Its totient is φ = 206123022.

The previous prime is 206122997. The next prime is 206123051. The reversal of 206123023 is 320321602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206123023 is a prime.

It is a super-2 number, since 2×206123023² = 84973401221317058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206123053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103061511 + 103061512.

It is an arithmetic number, because the mean of its divisors is an integer number (103061512).

Almost surely, 2^206123023 is an apocalyptic number.

206123023 is a deficient number, since it is larger than the sum of its proper divisors (1).

206123023 is an equidigital number, since it uses as much as digits as its factorization.

206123023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 206123023 is about 14356.9851640238. The cubic root of 206123023 is about 590.7116023659.

Adding to 206123023 its reverse (320321602), we get a palindrome (526444625).

The spelling of 206123023 in words is "two hundred six million, one hundred twenty-three thousand, twenty-three".