122568891 has 4 divisors (see below), whose sum is σ = 163425192. Its totient is φ = 81712592.

The previous prime is 122568881. The next prime is 122568911. The reversal of 122568891 is 198865221.

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 122568891 - 2⁷ = 122568763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122568811) 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, 20428146 + ... + 20428151.

It is an arithmetic number, because the mean of its divisors is an integer number (40856298).

Almost surely, 2^122568891 is an apocalyptic number.

122568891 is a deficient number, since it is larger than the sum of its proper divisors (40856301).

122568891 is an equidigital number, since it uses as much as digits as its factorization.

122568891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40856300.

The product of its digits is 69120, while the sum is 42.

The square root of 122568891 is about 11071.0835513061. The cubic root of 122568891 is about 496.7372769200.

The spelling of 122568891 in words is "one hundred twenty-two million, five hundred sixty-eight thousand, eight hundred ninety-one".