422987 has 2 divisors, whose sum is σ = 422988. Its totient is φ = 422986.

The previous prime is 422969. The next prime is 423001. The reversal of 422987 is 789224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 422987 - 2⁶ = 422923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211493 + 211494.

It is an arithmetic number, because the mean of its divisors is an integer number (211494).

2⁴²²⁹⁸⁷ is an apocalyptic number.

422987 is a deficient number, since it is larger than the sum of its proper divisors (1).

422987 is an equidigital number, since it uses as much as digits as its factorization.

422987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 422987 is about 650.3745074955. The cubic root of 422987 is about 75.0658384833.

The spelling of 422987 in words is "four hundred twenty-two thousand, nine hundred eighty-seven".