405356023 has 2 divisors, whose sum is σ = 405356024. Its totient is φ = 405356022.

The previous prime is 405356009. The next prime is 405356033. The reversal of 405356023 is 320653504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405356023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405355982 and 405356000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405356033) 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 as a sum of consecutive naturals, namely, 202678011 + 202678012.

It is an arithmetic number, because the mean of its divisors is an integer number (202678012).

Almost surely, 2^405356023 is an apocalyptic number.

405356023 is a deficient number, since it is larger than the sum of its proper divisors (1).

405356023 is an equidigital number, since it uses as much as digits as its factorization.

405356023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 405356023 is about 20133.4553169594. The cubic root of 405356023 is about 740.0803558953.

The spelling of 405356023 in words is "four hundred five million, three hundred fifty-six thousand, twenty-three".