422991685 has 4 divisors (see below), whose sum is σ = 507590028. Its totient is φ = 338393344.

The previous prime is 422991677. The next prime is 422991691. The reversal of 422991685 is 586199224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148791204 + 274200481 = 12198^2 + 16559^2 .

It is a cyclic number.

It is not a de Polignac number, because 422991685 - 2³ = 422991677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42299164 + ... + 42299173.

It is an arithmetic number, because the mean of its divisors is an integer number (126897507).

Almost surely, 2^422991685 is an apocalyptic number.

It is an amenable number.

422991685 is a deficient number, since it is larger than the sum of its proper divisors (84598343).

422991685 is an equidigital number, since it uses as much as digits as its factorization.

422991685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84598342.

The product of its digits is 311040, while the sum is 46.

The square root of 422991685 is about 20566.7616556423. The cubic root of 422991685 is about 750.6611562512.

The spelling of 422991685 in words is "four hundred twenty-two million, nine hundred ninety-one thousand, six hundred eighty-five".