121993523 has 4 divisors (see below), whose sum is σ = 122056728. Its totient is φ = 121930320.

The previous prime is 121993519. The next prime is 121993561. The reversal of 121993523 is 325399121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325399121 = 17959 ⋅18119.

It is a cyclic number.

It is not a de Polignac number, because 121993523 - 2² = 121993519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121993723) 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, 28613 + ... + 32598.

It is an arithmetic number, because the mean of its divisors is an integer number (30514182).

Almost surely, 2^121993523 is an apocalyptic number.

121993523 is a deficient number, since it is larger than the sum of its proper divisors (63205).

121993523 is an equidigital number, since it uses as much as digits as its factorization.

121993523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63204.

The product of its digits is 14580, while the sum is 35.

The square root of 121993523 is about 11045.0678132821. The cubic root of 121993523 is about 495.9587892291.

The spelling of 121993523 in words is "one hundred twenty-one million, nine hundred ninety-three thousand, five hundred twenty-three".