172001287 has 2 divisors, whose sum is σ = 172001288.
Its totient is φ = 172001286.
The previous prime is 172001267. The next prime is 172001293. The reversal of 172001287 is 782100271.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 172001287 - 215 = 171968519 is a prime.
172001287 is a modest number, since divided by 1287 gives 172 as remainder.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (172001267) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86000643 + 86000644.
It is an arithmetic number, because the mean of its divisors is an integer number (86000644).
Almost surely, 2172001287 is an apocalyptic number.
172001287 is a deficient number, since it is larger than the sum of its proper divisors (1).
172001287 is an equidigital number, since it uses as much as digits as its factorization.
172001287 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1568, while the sum is 28.
The square root of 172001287 is about 13114.9261149272.
The cubic root of 172001287 is about 556.1311637398.
The spelling of 172001287 in words is "one hundred seventy-two million, one thousand, two hundred eighty-seven".