121428893 has 2 divisors, whose sum is σ = 121428894. Its totient is φ = 121428892.

The previous prime is 121428889. The next prime is 121428899. The reversal of 121428893 is 398824121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112296409 + 9132484 = 10597^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 121428893 - 2² = 121428889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121428899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60714446 + 60714447.

It is an arithmetic number, because the mean of its divisors is an integer number (60714447).

Almost surely, 2^121428893 is an apocalyptic number.

It is an amenable number.

121428893 is a deficient number, since it is larger than the sum of its proper divisors (1).

121428893 is an equidigital number, since it uses as much as digits as its factorization.

121428893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 121428893 is about 11019.4778914430. The cubic root of 121428893 is about 495.1924470219.

The spelling of 121428893 in words is "one hundred twenty-one million, four hundred twenty-eight thousand, eight hundred ninety-three".