173121099 has 8 divisors (see below), whose sum is σ = 234273600. Its totient is φ = 113691336.

The previous prime is 173121079. The next prime is 173121107. The reversal of 173121099 is 990121371.

173121099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 173121099 - 2¹² = 173117003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (173121029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430449 + ... + 430850.

It is an arithmetic number, because the mean of its divisors is an integer number (29284200).

Almost surely, 2^173121099 is an apocalyptic number.

173121099 is a deficient number, since it is larger than the sum of its proper divisors (61152501).

173121099 is an equidigital number, since it uses as much as digits as its factorization.

173121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861369.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 173121099 is about 13157.5491258821. The cubic root of 173121099 is about 557.3354487648.

The spelling of 173121099 in words is "one hundred seventy-three million, one hundred twenty-one thousand, ninety-nine".