121943893 has 2 divisors, whose sum is σ = 121943894. Its totient is φ = 121943892.

The previous prime is 121943879. The next prime is 121943903. The reversal of 121943893 is 398349121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96471684 + 25472209 = 9822^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 121943893 - 2²⁵ = 88389461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121943813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60971946 + 60971947.

It is an arithmetic number, because the mean of its divisors is an integer number (60971947).

Almost surely, 2^121943893 is an apocalyptic number.

It is an amenable number.

121943893 is a deficient number, since it is larger than the sum of its proper divisors (1).

121943893 is an equidigital number, since it uses as much as digits as its factorization.

121943893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 121943893 is about 11042.8208805540. The cubic root of 121943893 is about 495.8915239821.

The spelling of 121943893 in words is "one hundred twenty-one million, nine hundred forty-three thousand, eight hundred ninety-three".