121993 has 2 divisors, whose sum is σ = 121994. Its totient is φ = 121992.

The previous prime is 121967. The next prime is 121997. The reversal of 121993 is 399121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97344 + 24649 = 312^2 + 157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121993 is a prime.

It is not a weakly prime, because it can be changed into another prime (121997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60996 + 60997.

It is an arithmetic number, because the mean of its divisors is an integer number (60997).

2¹²¹⁹⁹³ is an apocalyptic number.

It is an amenable number.

121993 is a deficient number, since it is larger than the sum of its proper divisors (1).

121993 is an equidigital number, since it uses as much as digits as its factorization.

121993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 25.

The square root of 121993 is about 349.2749633169. The cubic root of 121993 is about 49.5958080484.

The spelling of 121993 in words is "one hundred twenty-one thousand, nine hundred ninety-three".