121393 has 4 divisors (see below), whose sum is σ = 122148. Its totient is φ = 120640.

The previous prime is 121379. The next prime is 121403. The reversal of 121393 is 393121.

It is the 26-th Fibonacci number F₂₆.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 29584 + 91809 = 172^2 + 303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121393.

It is not an unprimeable number, because it can be changed into a prime (121313) 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, 28 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (30537).

2¹²¹³⁹³ is an apocalyptic number.

It is an amenable number.

121393 is a deficient number, since it is larger than the sum of its proper divisors (755).

121393 is an equidigital number, since it uses as much as digits as its factorization.

121393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754.

The product of its digits is 162, while the sum is 19.

The square root of 121393 is about 348.4149824563. The cubic root of 121393 is about 49.5143651128.

The spelling of 121393 in words is "one hundred twenty-one thousand, three hundred ninety-three".