622296991 has 2 divisors, whose sum is σ = 622296992. Its totient is φ = 622296990.

The previous prime is 622296977. The next prime is 622297003. The reversal of 622296991 is 199692226.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 622296991 - 2⁵ = 622296959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622296931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311148495 + 311148496.

It is an arithmetic number, because the mean of its divisors is an integer number (311148496).

Almost surely, 2^622296991 is an apocalyptic number.

622296991 is a deficient number, since it is larger than the sum of its proper divisors (1).

622296991 is an equidigital number, since it uses as much as digits as its factorization.

622296991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 622296991 is about 24945.8812432033. The cubic root of 622296991 is about 853.7536374336.

The spelling of 622296991 in words is "six hundred twenty-two million, two hundred ninety-six thousand, nine hundred ninety-one".