7172887 has 4 divisors (see below), whose sum is σ = 7178760. Its totient is φ = 7167016.

The previous prime is 7172881. The next prime is 7172897. The reversal of 7172887 is 7882717.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7882717 = 43 ⋅183319.

It is a cyclic number.

It is not a de Polignac number, because 7172887 - 2¹⁹ = 6648599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7172881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337 + ... + 3802.

It is an arithmetic number, because the mean of its divisors is an integer number (1794690).

Almost surely, 2^7172887 is an apocalyptic number.

7172887 is a deficient number, since it is larger than the sum of its proper divisors (5873).

7172887 is a wasteful number, since it uses less digits than its factorization.

7172887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872.

The product of its digits is 43904, while the sum is 40.

The square root of 7172887 is about 2678.2245984980. The cubic root of 7172887 is about 192.8551895027.

The spelling of 7172887 in words is "seven million, one hundred seventy-two thousand, eight hundred eighty-seven".