122289691 has 2 divisors, whose sum is σ = 122289692. Its totient is φ = 122289690.

The previous prime is 122289659. The next prime is 122289731. The reversal of 122289691 is 196982221.

It is an a-pointer prime, because the next prime (122289731) can be obtained adding 122289691 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (196982221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122289691 - 2⁵ = 122289659 is a prime.

It is not a weakly prime, because it can be changed into another prime (122289611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61144845 + 61144846.

It is an arithmetic number, because the mean of its divisors is an integer number (61144846).

Almost surely, 2^122289691 is an apocalyptic number.

122289691 is a deficient number, since it is larger than the sum of its proper divisors (1).

122289691 is an equidigital number, since it uses as much as digits as its factorization.

122289691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 122289691 is about 11058.4669371482. The cubic root of 122289691 is about 496.3598171183.

The spelling of 122289691 in words is "one hundred twenty-two million, two hundred eighty-nine thousand, six hundred ninety-one".