121845379 has 2 divisors, whose sum is σ = 121845380. Its totient is φ = 121845378.

The previous prime is 121845377. The next prime is 121845389. The reversal of 121845379 is 973548121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121845379 - 2¹ = 121845377 is a prime.

Together with 121845377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121845377) 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, 60922689 + 60922690.

It is an arithmetic number, because the mean of its divisors is an integer number (60922690).

Almost surely, 2^121845379 is an apocalyptic number.

121845379 is a deficient number, since it is larger than the sum of its proper divisors (1).

121845379 is an equidigital number, since it uses as much as digits as its factorization.

121845379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 121845379 is about 11038.3594342638. The cubic root of 121845379 is about 495.7579504792.

The spelling of 121845379 in words is "one hundred twenty-one million, eight hundred forty-five thousand, three hundred seventy-nine".