121694387 has 2 divisors, whose sum is σ = 121694388. Its totient is φ = 121694386.

The previous prime is 121694341. The next prime is 121694393. The reversal of 121694387 is 783496121.

It is a strong prime.

It is an emirp because it is prime and its reverse (783496121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121694387 - 2²⁶ = 54585523 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (121694317) 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, 60847193 + 60847194.

It is an arithmetic number, because the mean of its divisors is an integer number (60847194).

Almost surely, 2^121694387 is an apocalyptic number.

121694387 is a deficient number, since it is larger than the sum of its proper divisors (1).

121694387 is an equidigital number, since it uses as much as digits as its factorization.

121694387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 121694387 is about 11031.5178919313. The cubic root of 121694387 is about 495.5530831112.

The spelling of 121694387 in words is "one hundred twenty-one million, six hundred ninety-four thousand, three hundred eighty-seven".