172109393 has 8 divisors (see below), whose sum is σ = 174521088. Its totient is φ = 169712784.

The previous prime is 172109369. The next prime is 172109407. The reversal of 172109393 is 393901271.

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

It is a cyclic number.

It is not a de Polignac number, because 172109393 - 2¹⁶ = 172043857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172109323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20255 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (21815136).

Almost surely, 2^172109393 is an apocalyptic number.

It is an amenable number.

172109393 is a deficient number, since it is larger than the sum of its proper divisors (2411695).

172109393 is a wasteful number, since it uses less digits than its factorization.

172109393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 172109393 is about 13119.0469547144. The cubic root of 172109393 is about 556.2476522562.

The spelling of 172109393 in words is "one hundred seventy-two million, one hundred nine thousand, three hundred ninety-three".