172113983 has 4 divisors (see below), whose sum is σ = 172200840. Its totient is φ = 172027128.

The previous prime is 172113979. The next prime is 172114003. The reversal of 172113983 is 389311271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172113983 - 2² = 172113979 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 (172113883) 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 3 ways as a sum of consecutive naturals, for example, 40385 + ... + 44442.

It is an arithmetic number, because the mean of its divisors is an integer number (43050210).

Almost surely, 2^172113983 is an apocalyptic number.

172113983 is a deficient number, since it is larger than the sum of its proper divisors (86857).

172113983 is an equidigital number, since it uses as much as digits as its factorization.

172113983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86856.

The product of its digits is 9072, while the sum is 35.

The square root of 172113983 is about 13119.2218900360. The cubic root of 172113983 is about 556.2525970842.

The spelling of 172113983 in words is "one hundred seventy-two million, one hundred thirteen thousand, nine hundred eighty-three".