172117103 has 2 divisors, whose sum is σ = 172117104. Its totient is φ = 172117102.

The previous prime is 172117069. The next prime is 172117109. The reversal of 172117103 is 301711271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172117103 - 2¹⁶ = 172051567 is a prime.

It is a super-2 number, since 2×172117103² = 59248594290225218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172117109) 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, 86058551 + 86058552.

It is an arithmetic number, because the mean of its divisors is an integer number (86058552).

Almost surely, 2^172117103 is an apocalyptic number.

172117103 is a deficient number, since it is larger than the sum of its proper divisors (1).

172117103 is an equidigital number, since it uses as much as digits as its factorization.

172117103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294, while the sum is 23.

The square root of 172117103 is about 13119.3407989883. The cubic root of 172117103 is about 556.2559582243.

Adding to 172117103 its reverse (301711271), we get a palindrome (473828374).

The spelling of 172117103 in words is "one hundred seventy-two million, one hundred seventeen thousand, one hundred three".