121923173 has 2 divisors, whose sum is σ = 121923174. Its totient is φ = 121923172.

The previous prime is 121923169. The next prime is 121923181. The reversal of 121923173 is 371329121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88491649 + 33431524 = 9407^2 + 5782^2 .

It is a cyclic number.

It is not a de Polignac number, because 121923173 - 2² = 121923169 is a prime.

It is a super-2 number, since 2×121923173² = 29730520228775858, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121923143) 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, 60961586 + 60961587.

It is an arithmetic number, because the mean of its divisors is an integer number (60961587).

Almost surely, 2^121923173 is an apocalyptic number.

It is an amenable number.

121923173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121923173 is an equidigital number, since it uses as much as digits as its factorization.

121923173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 121923173 is about 11041.8826746167. The cubic root of 121923173 is about 495.8634360526.

The spelling of 121923173 in words is "one hundred twenty-one million, nine hundred twenty-three thousand, one hundred seventy-three".