121604173 has 4 divisors (see below), whose sum is σ = 121766848. Its totient is φ = 121441500.

The previous prime is 121604167. The next prime is 121604177. The reversal of 121604173 is 371406121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371406121 = 59 ⋅6295019.

It is a cyclic number.

It is not a de Polignac number, because 121604173 - 2⁵ = 121604141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121604177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80211 + ... + 81712.

It is an arithmetic number, because the mean of its divisors is an integer number (30441712).

Almost surely, 2^121604173 is an apocalyptic number.

It is an amenable number.

121604173 is a deficient number, since it is larger than the sum of its proper divisors (162675).

121604173 is an equidigital number, since it uses as much as digits as its factorization.

121604173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162674.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 121604173 is about 11027.4282133234. The cubic root of 121604173 is about 495.4305990247.

The spelling of 121604173 in words is "one hundred twenty-one million, six hundred four thousand, one hundred seventy-three".