122808091 has 4 divisors (see below), whose sum is σ = 140352112. Its totient is φ = 105264072.

The previous prime is 122808089. The next prime is 122808097. The reversal of 122808091 is 190808221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122808091 - 2¹ = 122808089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122808097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8772000 + ... + 8772013.

It is an arithmetic number, because the mean of its divisors is an integer number (35088028).

Almost surely, 2^122808091 is an apocalyptic number.

122808091 is a deficient number, since it is larger than the sum of its proper divisors (17544021).

122808091 is an equidigital number, since it uses as much as digits as its factorization.

122808091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17544020.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 122808091 is about 11081.8812031171. The cubic root of 122808091 is about 497.0602037384.

The spelling of 122808091 in words is "one hundred twenty-two million, eight hundred eight thousand, ninety-one".