422013187 has 2 divisors, whose sum is σ = 422013188. Its totient is φ = 422013186.

The previous prime is 422013173. The next prime is 422013257. The reversal of 422013187 is 781310224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422013187 - 2²³ = 413624579 is a prime.

It is not a weakly prime, because it can be changed into another prime (422013127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211006593 + 211006594.

It is an arithmetic number, because the mean of its divisors is an integer number (211006594).

Almost surely, 2^422013187 is an apocalyptic number.

422013187 is a deficient number, since it is larger than the sum of its proper divisors (1).

422013187 is an equidigital number, since it uses as much as digits as its factorization.

422013187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 422013187 is about 20542.9595482248. The cubic root of 422013187 is about 750.0818796532.

The spelling of 422013187 in words is "four hundred twenty-two million, thirteen thousand, one hundred eighty-seven".