172093823 has 12 divisors (see below), whose sum is σ = 190386840. Its totient is φ = 155435280.

The previous prime is 172093793. The next prime is 172093841. The reversal of 172093823 is 328390271.

It is not a de Polignac number, because 172093823 - 2¹² = 172089727 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 (172093853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14468 + ... + 23526.

It is an arithmetic number, because the mean of its divisors is an integer number (15865570).

Almost surely, 2^172093823 is an apocalyptic number.

172093823 is a deficient number, since it is larger than the sum of its proper divisors (18293017).

172093823 is a wasteful number, since it uses less digits than its factorization.

172093823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9238 (or 9227 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 172093823 is about 13118.4535292846. The cubic root of 172093823 is about 556.2308779691.

The spelling of 172093823 in words is "one hundred seventy-two million, ninety-three thousand, eight hundred twenty-three".