121643423 has 8 divisors (see below), whose sum is σ = 132935040. Its totient is φ = 110390680.

The previous prime is 121643419. The next prime is 121643471. The reversal of 121643423 is 324346121.

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

It is a cyclic number.

It is not a de Polignac number, because 121643423 - 2² = 121643419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 121643392 and 121643401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121643323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2963 + ... + 15876.

It is an arithmetic number, because the mean of its divisors is an integer number (16616880).

Almost surely, 2^121643423 is an apocalyptic number.

121643423 is a deficient number, since it is larger than the sum of its proper divisors (11291617).

121643423 is a wasteful number, since it uses less digits than its factorization.

121643423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19437.

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

The square root of 121643423 is about 11029.2077231322. The cubic root of 121643423 is about 495.4838964261.

Adding to 121643423 its reverse (324346121), we get a palindrome (445989544).

The spelling of 121643423 in words is "one hundred twenty-one million, six hundred forty-three thousand, four hundred twenty-three".