172083998 has 4 divisors (see below), whose sum is σ = 258126000. Its totient is φ = 86041998.

The previous prime is 172083991. The next prime is 172084009. The reversal of 172083998 is 899380271.

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

It is a super-2 number, since 2×172083998² = 59225804735328008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172083991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43020998 + ... + 43021001.

It is an arithmetic number, because the mean of its divisors is an integer number (64531500).

Almost surely, 2^172083998 is an apocalyptic number.

172083998 is a deficient number, since it is larger than the sum of its proper divisors (86042002).

172083998 is an equidigital number, since it uses as much as digits as its factorization.

172083998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86042001.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 172083998 is about 13118.0790514465. The cubic root of 172083998 is about 556.2202925177.

The spelling of 172083998 in words is "one hundred seventy-two million, eighty-three thousand, nine hundred ninety-eight".