422425987 has 2 divisors, whose sum is σ = 422425988. Its totient is φ = 422425986.

The previous prime is 422425967. The next prime is 422426029. The reversal of 422425987 is 789524224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422425987 is a prime.

It is not a weakly prime, because it can be changed into another prime (422425907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211212993 + 211212994.

It is an arithmetic number, because the mean of its divisors is an integer number (211212994).

Almost surely, 2^422425987 is an apocalyptic number.

422425987 is a deficient number, since it is larger than the sum of its proper divisors (1).

422425987 is an equidigital number, since it uses as much as digits as its factorization.

422425987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 43.

The square root of 422425987 is about 20553.0043302676. The cubic root of 422425987 is about 750.3263687721.

It can be divided in two parts, 422 and 425987, that added together give a square (426409 = 653²).

The spelling of 422425987 in words is "four hundred twenty-two million, four hundred twenty-five thousand, nine hundred eighty-seven".