405210023 has 2 divisors, whose sum is σ = 405210024. Its totient is φ = 405210022.

The previous prime is 405209999. The next prime is 405210041. The reversal of 405210023 is 320012504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405210023 - 2⁸ = 405209767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405209983 and 405210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405212023) 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 as a sum of consecutive naturals, namely, 202605011 + 202605012.

It is an arithmetic number, because the mean of its divisors is an integer number (202605012).

Almost surely, 2^405210023 is an apocalyptic number.

405210023 is a deficient number, since it is larger than the sum of its proper divisors (1).

405210023 is an equidigital number, since it uses as much as digits as its factorization.

405210023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 405210023 is about 20129.8291845708. The cubic root of 405210023 is about 739.9914918671.

Adding to 405210023 its reverse (320012504), we get a palindrome (725222527).

The spelling of 405210023 in words is "four hundred five million, two hundred ten thousand, twenty-three".