172103399 has 4 divisors (see below), whose sum is σ = 185342136. Its totient is φ = 158864664.

The previous prime is 172103389. The next prime is 172103431. The reversal of 172103399 is 993301271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993301271 = 487 ⋅2039633.

It is a cyclic number.

It is not a de Polignac number, because 172103399 - 2¹² = 172099303 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 (172103339) 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, 6619349 + ... + 6619374.

It is an arithmetic number, because the mean of its divisors is an integer number (46335534).

Almost surely, 2^172103399 is an apocalyptic number.

172103399 is a deficient number, since it is larger than the sum of its proper divisors (13238737).

172103399 is a wasteful number, since it uses less digits than its factorization.

172103399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13238736.

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

The square root of 172103399 is about 13118.8185062528. The cubic root of 172103399 is about 556.2411947603.

The spelling of 172103399 in words is "one hundred seventy-two million, one hundred three thousand, three hundred ninety-nine".