9121859 has 2 divisors, whose sum is σ = 9121860. Its totient is φ = 9121858.

The previous prime is 9121841. The next prime is 9121897. The reversal of 9121859 is 9581219.

It is a weak prime.

It is an emirp because it is prime and its reverse (9581219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9121859 is a prime.

It is not a weakly prime, because it can be changed into another prime (9121829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560929 + 4560930.

It is an arithmetic number, because the mean of its divisors is an integer number (4560930).

Almost surely, 2^9121859 is an apocalyptic number.

9121859 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121859 is an equidigital number, since it uses as much as digits as its factorization.

9121859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 35.

The square root of 9121859 is about 3020.2415466317. The cubic root of 9121859 is about 208.9429802557.

The spelling of 9121859 in words is "nine million, one hundred twenty-one thousand, eight hundred fifty-nine".