122171977 has 4 divisors (see below), whose sum is σ = 122233540. Its totient is φ = 122110416.

The previous prime is 122171971. The next prime is 122171989. The reversal of 122171977 is 779171221.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28933641 + 93238336 = 5379^2 + 9656^2 .

It is a cyclic number.

It is not a de Polignac number, because 122171977 - 2⁷ = 122171849 is a prime.

It is a super-4 number, since 4×122171977⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122171971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27702 + ... + 31807.

It is an arithmetic number, because the mean of its divisors is an integer number (30558385).

Almost surely, 2^122171977 is an apocalyptic number.

It is an amenable number.

122171977 is a deficient number, since it is larger than the sum of its proper divisors (61563).

122171977 is an equidigital number, since it uses as much as digits as its factorization.

122171977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61562.

The product of its digits is 12348, while the sum is 37.

The square root of 122171977 is about 11053.1433085797. The cubic root of 122171977 is about 496.2005034522.

The spelling of 122171977 in words is "one hundred twenty-two million, one hundred seventy-one thousand, nine hundred seventy-seven".