121923959 has 2 divisors, whose sum is σ = 121923960. Its totient is φ = 121923958.

The previous prime is 121923941. The next prime is 121923973. The reversal of 121923959 is 959329121.

It is a strong prime.

It is an emirp because it is prime and its reverse (959329121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121923959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121923979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60961979 + 60961980.

It is an arithmetic number, because the mean of its divisors is an integer number (60961980).

Almost surely, 2^121923959 is an apocalyptic number.

121923959 is a deficient number, since it is larger than the sum of its proper divisors (1).

121923959 is an equidigital number, since it uses as much as digits as its factorization.

121923959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 41.

The square root of 121923959 is about 11041.9182663159. The cubic root of 121923959 is about 495.8645016084.

The spelling of 121923959 in words is "one hundred twenty-one million, nine hundred twenty-three thousand, nine hundred fifty-nine".