122809091 has 2 divisors, whose sum is σ = 122809092. Its totient is φ = 122809090.

The previous prime is 122809087. The next prime is 122809097. The reversal of 122809091 is 190908221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122809091 - 2² = 122809087 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122809097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61404545 + 61404546.

It is an arithmetic number, because the mean of its divisors is an integer number (61404546).

Almost surely, 2^122809091 is an apocalyptic number.

122809091 is a deficient number, since it is larger than the sum of its proper divisors (1).

122809091 is an equidigital number, since it uses as much as digits as its factorization.

122809091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 122809091 is about 11081.9263217186. The cubic root of 122809091 is about 497.0615528864.

The spelling of 122809091 in words is "one hundred twenty-two million, eight hundred nine thousand, ninety-one".