622131091 has 2 divisors, whose sum is σ = 622131092. Its totient is φ = 622131090.

The previous prime is 622131077. The next prime is 622131109. The reversal of 622131091 is 190131226.

Together with next prime (622131109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 622131091 - 2¹¹ = 622129043 is a prime.

It is not a weakly prime, because it can be changed into another prime (622131011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311065545 + 311065546.

It is an arithmetic number, because the mean of its divisors is an integer number (311065546).

Almost surely, 2^622131091 is an apocalyptic number.

622131091 is a deficient number, since it is larger than the sum of its proper divisors (1).

622131091 is an equidigital number, since it uses as much as digits as its factorization.

622131091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 622131091 is about 24942.5558233313. Note that the first 3 decimals coincide. The cubic root of 622131091 is about 853.6777624528.

The spelling of 622131091 in words is "six hundred twenty-two million, one hundred thirty-one thousand, ninety-one".