402666023 has 2 divisors, whose sum is σ = 402666024. Its totient is φ = 402666022.

The previous prime is 402666013. The next prime is 402666053. The reversal of 402666023 is 320666204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402666023 - 2²⁴ = 385888807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402666013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201333011 + 201333012.

It is an arithmetic number, because the mean of its divisors is an integer number (201333012).

Almost surely, 2^402666023 is an apocalyptic number.

402666023 is a deficient number, since it is larger than the sum of its proper divisors (1).

402666023 is an equidigital number, since it uses as much as digits as its factorization.

402666023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 402666023 is about 20066.5398860890. The cubic root of 402666023 is about 738.4396284596.

The spelling of 402666023 in words is "four hundred two million, six hundred sixty-six thousand, twenty-three".