121723329 has 64 divisors (see below), whose sum is σ = 217333760. Its totient is φ = 58786560.

The previous prime is 121723241. The next prime is 121723333. The reversal of 121723329 is 923327121.

It is not a de Polignac number, because 121723329 - 2⁷ = 121723201 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121723296 and 121723305.

It is not an unprimeable number, because it can be changed into a prime (121723379) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 160419 + ... + 161175.

It is an arithmetic number, because the mean of its divisors is an integer number (3395840).

Almost surely, 2^121723329 is an apocalyptic number.

121723329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

121723329 is a deficient number, since it is larger than the sum of its proper divisors (95610431).

121723329 is a wasteful number, since it uses less digits than its factorization.

121723329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830.

The product of its digits is 4536, while the sum is 30.

The square root of 121723329 is about 11032.8296007869. The cubic root of 121723329 is about 495.5923650119.

The spelling of 121723329 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, three hundred twenty-nine".