402023 has 2 divisors, whose sum is σ = 402024. Its totient is φ = 402022.

The previous prime is 401993. The next prime is 402029. The reversal of 402023 is 320204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402023 - 2⁶ = 401959 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 401995 and 402013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201011 + 201012.

It is an arithmetic number, because the mean of its divisors is an integer number (201012).

2⁴⁰²⁰²³ is an apocalyptic number.

402023 is a deficient number, since it is larger than the sum of its proper divisors (1).

402023 is an equidigital number, since it uses as much as digits as its factorization.

402023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 402023 is about 634.0528369150. The cubic root of 402023 is about 73.8046344184.

Adding to 402023 its reverse (320204), we get a palindrome (722227).

The spelling of 402023 in words is "four hundred two thousand, twenty-three", and thus it is an iban number.