172893108983 has 4 divisors (see below), whose sum is σ = 197592124560. Its totient is φ = 148194093408.

The previous prime is 172893108959. The next prime is 172893109013. The reversal of 172893108983 is 389801398271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389801398271 = 43 ⋅9065148797.

It is a cyclic number.

It is not a de Polignac number, because 172893108983 - 2¹⁸ = 172892846839 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 (172893128983) 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, 12349507778 + ... + 12349507791.

It is an arithmetic number, because the mean of its divisors is an integer number (49398031140).

Almost surely, 2^172893108983 is an apocalyptic number.

172893108983 is a deficient number, since it is larger than the sum of its proper divisors (24699015577).

172893108983 is an equidigital number, since it uses as much as digits as its factorization.

172893108983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24699015576.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 172893108983 in words is "one hundred seventy-two billion, eight hundred ninety-three million, one hundred eight thousand, nine hundred eighty-three".