402023971 has 2 divisors, whose sum is σ = 402023972. Its totient is φ = 402023970.

The previous prime is 402023959. The next prime is 402024017. The reversal of 402023971 is 179320204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402023971 - 2¹⁷ = 401892899 is a prime.

It is not a weakly prime, because it can be changed into another prime (402023771) 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, 201011985 + 201011986.

It is an arithmetic number, because the mean of its divisors is an integer number (201011986).

Almost surely, 2^402023971 is an apocalyptic number.

402023971 is a deficient number, since it is larger than the sum of its proper divisors (1).

402023971 is an equidigital number, since it uses as much as digits as its factorization.

402023971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 402023971 is about 20050.5354292597. The cubic root of 402023971 is about 738.0469383805.

The spelling of 402023971 in words is "four hundred two million, twenty-three thousand, nine hundred seventy-one".