172087487 has 12 divisors (see below), whose sum is σ = 202357176. Its totient is φ = 144277440.

The previous prime is 172087477. The next prime is 172087493. The reversal of 172087487 is 784780271.

It is not a de Polignac number, because 172087487 - 2⁴ = 172087471 is a prime.

It is a super-2 number, since 2×172087487² = 59228206363950338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172087477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156323 + ... + 157419.

It is an arithmetic number, because the mean of its divisors is an integer number (16863098).

Almost surely, 2^172087487 is an apocalyptic number.

172087487 is a deficient number, since it is larger than the sum of its proper divisors (30269689).

172087487 is an equidigital number, since it uses as much as digits as its factorization.

172087487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 44.

The square root of 172087487 is about 13118.2120351822. The cubic root of 172087487 is about 556.2240516112.

The spelling of 172087487 in words is "one hundred seventy-two million, eighty-seven thousand, four hundred eighty-seven".