121620379 has 2 divisors, whose sum is σ = 121620380. Its totient is φ = 121620378.

The previous prime is 121620371. The next prime is 121620419. The reversal of 121620379 is 973026121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121620379 - 2³ = 121620371 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121620379.

It is not a weakly prime, because it can be changed into another prime (121620371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60810189 + 60810190.

It is an arithmetic number, because the mean of its divisors is an integer number (60810190).

Almost surely, 2^121620379 is an apocalyptic number.

121620379 is a deficient number, since it is larger than the sum of its proper divisors (1).

121620379 is an equidigital number, since it uses as much as digits as its factorization.

121620379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 121620379 is about 11028.1629929921. The cubic root of 121620379 is about 495.4526064703.

The spelling of 121620379 in words is "one hundred twenty-one million, six hundred twenty thousand, three hundred seventy-nine".