422987783 has 2 divisors, whose sum is σ = 422987784. Its totient is φ = 422987782.

The previous prime is 422987743. The next prime is 422987791. The reversal of 422987783 is 387789224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 422987783 - 2⁸ = 422987527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422987713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211493891 + 211493892.

It is an arithmetic number, because the mean of its divisors is an integer number (211493892).

Almost surely, 2^422987783 is an apocalyptic number.

422987783 is a deficient number, since it is larger than the sum of its proper divisors (1).

422987783 is an equidigital number, since it uses as much as digits as its factorization.

422987783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 422987783 is about 20566.6667936251. Note that the first 3 decimals coincide. The cubic root of 422987783 is about 750.6588480192.

The spelling of 422987783 in words is "four hundred twenty-two million, nine hundred eighty-seven thousand, seven hundred eighty-three".