622951691 has 2 divisors, whose sum is σ = 622951692. Its totient is φ = 622951690.

The previous prime is 622951661. The next prime is 622951709. The reversal of 622951691 is 196159226.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 622951691 - 2¹⁰ = 622950667 is a prime.

It is not a weakly prime, because it can be changed into another prime (622951601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311475845 + 311475846.

It is an arithmetic number, because the mean of its divisors is an integer number (311475846).

Almost surely, 2^622951691 is an apocalyptic number.

622951691 is a deficient number, since it is larger than the sum of its proper divisors (1).

622951691 is an equidigital number, since it uses as much as digits as its factorization.

622951691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 622951691 is about 24959.0002003285. Note that the first 3 decimals coincide. The cubic root of 622951691 is about 854.0529353626.

The spelling of 622951691 in words is "six hundred twenty-two million, nine hundred fifty-one thousand, six hundred ninety-one".