422820649 has 2 divisors, whose sum is σ = 422820650. Its totient is φ = 422820648.

The previous prime is 422820641. The next prime is 422820679. The reversal of 422820649 is 946028224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422590249 + 230400 = 20557^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 422820649 - 2³ = 422820641 is a prime.

It is not a weakly prime, because it can be changed into another prime (422820641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211410324 + 211410325.

It is an arithmetic number, because the mean of its divisors is an integer number (211410325).

Almost surely, 2^422820649 is an apocalyptic number.

It is an amenable number.

422820649 is a deficient number, since it is larger than the sum of its proper divisors (1).

422820649 is an equidigital number, since it uses as much as digits as its factorization.

422820649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 422820649 is about 20562.6031669144. The cubic root of 422820649 is about 750.5599664054.

The spelling of 422820649 in words is "four hundred twenty-two million, eight hundred twenty thousand, six hundred forty-nine".