422721763 has 4 divisors (see below), whose sum is σ = 422909368. Its totient is φ = 422534160.

The previous prime is 422721749. The next prime is 422721821. The reversal of 422721763 is 367127224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 422721763 - 2⁵ = 422721731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422721743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90381 + ... + 94942.

It is an arithmetic number, because the mean of its divisors is an integer number (105727342).

Almost surely, 2^422721763 is an apocalyptic number.

422721763 is a deficient number, since it is larger than the sum of its proper divisors (187605).

422721763 is a wasteful number, since it uses less digits than its factorization.

422721763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187604.

The product of its digits is 28224, while the sum is 34.

The square root of 422721763 is about 20560.1985155786. The cubic root of 422721763 is about 750.5014501371.

Adding to 422721763 its reverse (367127224), we get a palindrome (789848987).

The spelling of 422721763 in words is "four hundred twenty-two million, seven hundred twenty-one thousand, seven hundred sixty-three".