121715823 has 8 divisors (see below), whose sum is σ = 162659200. Its totient is φ = 80958168.

The previous prime is 121715819. The next prime is 121715851. The reversal of 121715823 is 328517121.

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

It is not a de Polignac number, because 121715823 - 2² = 121715819 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 (121715873) 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, 44893 + ... + 47526.

It is an arithmetic number, because the mean of its divisors is an integer number (20332400).

Almost surely, 2^121715823 is an apocalyptic number.

121715823 is a deficient number, since it is larger than the sum of its proper divisors (40943377).

121715823 is an equidigital number, since it uses as much as digits as its factorization.

121715823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92861.

The product of its digits is 3360, while the sum is 30.

The square root of 121715823 is about 11032.4894289548. The cubic root of 121715823 is about 495.5821779952.

The spelling of 121715823 in words is "one hundred twenty-one million, seven hundred fifteen thousand, eight hundred twenty-three".