121859393 has 2 divisors, whose sum is σ = 121859394. Its totient is φ = 121859392.

The previous prime is 121859371. The next prime is 121859443. The reversal of 121859393 is 393958121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104611984 + 17247409 = 10228^2 + 4153^2 .

It is a cyclic number.

It is not a de Polignac number, because 121859393 - 2⁶ = 121859329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121859393.

It is not a weakly prime, because it can be changed into another prime (121859693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60929696 + 60929697.

It is an arithmetic number, because the mean of its divisors is an integer number (60929697).

Almost surely, 2^121859393 is an apocalyptic number.

It is an amenable number.

121859393 is a deficient number, since it is larger than the sum of its proper divisors (1).

121859393 is an equidigital number, since it uses as much as digits as its factorization.

121859393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 121859393 is about 11038.9942023719. The cubic root of 121859393 is about 495.7769562214.

The spelling of 121859393 in words is "one hundred twenty-one million, eight hundred fifty-nine thousand, three hundred ninety-three".