121864423 has 8 divisors (see below), whose sum is σ = 131407920. Its totient is φ = 112633920.

The previous prime is 121864367. The next prime is 121864459. The reversal of 121864423 is 324468121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121864423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121864123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77440 + ... + 78997.

It is an arithmetic number, because the mean of its divisors is an integer number (16425990).

Almost surely, 2^121864423 is an apocalyptic number.

121864423 is a deficient number, since it is larger than the sum of its proper divisors (9543497).

121864423 is a wasteful number, since it uses less digits than its factorization.

121864423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156497.

The product of its digits is 9216, while the sum is 31.

The square root of 121864423 is about 11039.2220287482. Note that the first 3 decimals coincide. The cubic root of 121864423 is about 495.7837775360.

The spelling of 121864423 in words is "one hundred twenty-one million, eight hundred sixty-four thousand, four hundred twenty-three".