172103999 has 4 divisors (see below), whose sum is σ = 172173864. Its totient is φ = 172034136.

The previous prime is 172103993. The next prime is 172104011. The reversal of 172103999 is 999301271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172103999 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 (172103993) 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 in 3 ways as a sum of consecutive naturals, for example, 31097 + ... + 36210.

It is an arithmetic number, because the mean of its divisors is an integer number (43043466).

Almost surely, 2^172103999 is an apocalyptic number.

172103999 is a deficient number, since it is larger than the sum of its proper divisors (69865).

172103999 is an equidigital number, since it uses as much as digits as its factorization.

172103999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69864.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 172103999 is about 13118.8413741458. The cubic root of 172103999 is about 556.2418411630.

The spelling of 172103999 in words is "one hundred seventy-two million, one hundred three thousand, nine hundred ninety-nine".