622920691 has 2 divisors, whose sum is σ = 622920692. Its totient is φ = 622920690.

The previous prime is 622920689. The next prime is 622920737. The reversal of 622920691 is 196029226.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 622920691 - 2¹ = 622920689 is a prime.

Together with 622920689, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 622920691.

It is not a weakly prime, because it can be changed into another prime (622920611) 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, 311460345 + 311460346.

It is an arithmetic number, because the mean of its divisors is an integer number (311460346).

Almost surely, 2^622920691 is an apocalyptic number.

622920691 is a deficient number, since it is larger than the sum of its proper divisors (1).

622920691 is an equidigital number, since it uses as much as digits as its factorization.

622920691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 622920691 is about 24958.3791741371. The cubic root of 622920691 is about 854.0387683571.

The spelling of 622920691 in words is "six hundred twenty-two million, nine hundred twenty thousand, six hundred ninety-one".