121644323 has 4 divisors (see below), whose sum is σ = 121795128. Its totient is φ = 121493520.

The previous prime is 121644317. The next prime is 121644337. The reversal of 121644323 is 323446121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323446121 = 53 ⋅6102757.

It is a cyclic number.

It is not a de Polignac number, because 121644323 - 2⁴ = 121644307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121644292 and 121644301.

It is not an unprimeable number, because it can be changed into a prime (121644223) 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, 74186 + ... + 75807.

It is an arithmetic number, because the mean of its divisors is an integer number (30448782).

Almost surely, 2^121644323 is an apocalyptic number.

121644323 is a deficient number, since it is larger than the sum of its proper divisors (150805).

121644323 is an equidigital number, since it uses as much as digits as its factorization.

121644323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150804.

The product of its digits is 3456, while the sum is 26.

The square root of 121644323 is about 11029.2485238116. The cubic root of 121644323 is about 495.4851183976.

The spelling of 121644323 in words is "one hundred twenty-one million, six hundred forty-four thousand, three hundred twenty-three".