622981318 has 4 divisors (see below), whose sum is σ = 934471980. Its totient is φ = 311490658.

The previous prime is 622981279. The next prime is 622981319. The reversal of 622981318 is 813189226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 813189226 = 2 ⋅406594613.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622981319) 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, 155745328 + ... + 155745331.

It is an arithmetic number, because the mean of its divisors is an integer number (233617995).

Almost surely, 2^622981318 is an apocalyptic number.

622981318 is a deficient number, since it is larger than the sum of its proper divisors (311490662).

622981318 is a wasteful number, since it uses less digits than its factorization.

622981318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311490661.

The product of its digits is 41472, while the sum is 40.

The square root of 622981318 is about 24959.5937066291. The cubic root of 622981318 is about 854.0664744677.

The spelling of 622981318 in words is "six hundred twenty-two million, nine hundred eighty-one thousand, three hundred eighteen".