172828471 has 2 divisors, whose sum is σ = 172828472. Its totient is φ = 172828470.

The previous prime is 172828423. The next prime is 172828483. The reversal of 172828471 is 174828271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172828471 - 2⁹ = 172827959 is a prime.

It is a super-3 number, since 3×172828471³ (a number of 26 digits) contains 333 as substring.

It is equal to p_9652387 and since 172828471 and 9652387 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172828771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86414235 + 86414236.

It is an arithmetic number, because the mean of its divisors is an integer number (86414236).

Almost surely, 2^172828471 is an apocalyptic number.

172828471 is a deficient number, since it is larger than the sum of its proper divisors (1).

172828471 is an equidigital number, since it uses as much as digits as its factorization.

172828471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 40.

The square root of 172828471 is about 13146.4242666970. The cubic root of 172828471 is about 557.0212487878.

The spelling of 172828471 in words is "one hundred seventy-two million, eight hundred twenty-eight thousand, four hundred seventy-one".