122081689 has 4 divisors (see below), whose sum is σ = 126019840. Its totient is φ = 118143540.

The previous prime is 122081681. The next prime is 122081699. The reversal of 122081689 is 986180221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122081689 - 2³ = 122081681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122081681) 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, 1969029 + ... + 1969090.

It is an arithmetic number, because the mean of its divisors is an integer number (31504960).

Almost surely, 2^122081689 is an apocalyptic number.

It is an amenable number.

122081689 is a deficient number, since it is larger than the sum of its proper divisors (3938151).

122081689 is an equidigital number, since it uses as much as digits as its factorization.

122081689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938150.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 122081689 is about 11049.0582856640. The cubic root of 122081689 is about 496.0782386661.

The spelling of 122081689 in words is "one hundred twenty-two million, eighty-one thousand, six hundred eighty-nine".