622363991 has 2 divisors, whose sum is σ = 622363992. Its totient is φ = 622363990.

The previous prime is 622363933. The next prime is 622363993. The reversal of 622363991 is 199363226.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 622363991 - 2¹⁸ = 622101847 is a prime.

Together with 622363993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622363993) 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, 311181995 + 311181996.

It is an arithmetic number, because the mean of its divisors is an integer number (311181996).

Almost surely, 2^622363991 is an apocalyptic number.

622363991 is a deficient number, since it is larger than the sum of its proper divisors (1).

622363991 is an equidigital number, since it uses as much as digits as its factorization.

622363991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 622363991 is about 24947.2241141174. The cubic root of 622363991 is about 853.7842763096.

The spelling of 622363991 in words is "six hundred twenty-two million, three hundred sixty-three thousand, nine hundred ninety-one".