172077287 has 4 divisors (see below), whose sum is σ = 176274336. Its totient is φ = 167880240.

The previous prime is 172077223. The next prime is 172077299. The reversal of 172077287 is 782770271.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 172077287 - 2⁶ = 172077223 is a prime.

It is a super-2 number, since 2×172077287² = 59221185402560738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 4197007 = 172077287 / (1 + 7 + 2 + 0 + 7 + 7 + 2 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172077487) 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 in 3 ways as a sum of consecutive naturals, for example, 2098463 + ... + 2098544.

It is an arithmetic number, because the mean of its divisors is an integer number (44068584).

Almost surely, 2^172077287 is an apocalyptic number.

172077287 is a deficient number, since it is larger than the sum of its proper divisors (4197049).

172077287 is an equidigital number, since it uses as much as digits as its factorization.

172077287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197048.

The product of its (nonzero) digits is 76832, while the sum is 41.

The square root of 172077287 is about 13117.8232569280. The cubic root of 172077287 is about 556.2130618572.

The spelling of 172077287 in words is "one hundred seventy-two million, seventy-seven thousand, two hundred eighty-seven".