172387 has 8 divisors (see below), whose sum is σ = 186560. Its totient is φ = 158760.

The previous prime is 172373. The next prime is 172399. The reversal of 172387 is 783271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172387 - 2⁷ = 172259 is a prime.

It is a Duffinian number.

172387 is a modest number, since divided by 387 gives 172 as remainder.

It is not an unprimeable number, because it can be changed into a prime (172307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (23320).

2¹⁷²³⁸⁷ is an apocalyptic number.

172387 is a deficient number, since it is larger than the sum of its proper divisors (14173).

172387 is a wasteful number, since it uses less digits than its factorization.

172387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 2352, while the sum is 28.

The square root of 172387 is about 415.1951348463. The cubic root of 172387 is about 55.6546561552.

It can be divided in two parts, 172 and 387, that multiplied together give a square (66564 = 258²).

The spelling of 172387 in words is "one hundred seventy-two thousand, three hundred eighty-seven".