687382172 has 6 divisors (see below), whose sum is σ = 1202918808. Its totient is φ = 343691084.

The previous prime is 687382151. The next prime is 687382177. The reversal of 687382172 is 271283786.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687382177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85922768 + ... + 85922775.

It is an arithmetic number, because the mean of its divisors is an integer number (200486468).

Almost surely, 2^687382172 is an apocalyptic number.

It is an amenable number.

687382172 is a deficient number, since it is larger than the sum of its proper divisors (515536636).

687382172 is a wasteful number, since it uses less digits than its factorization.

687382172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171845547 (or 171845545 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 687382172 is about 26217.9742161747. The cubic root of 687382172 is about 882.5366598739.

The spelling of 687382172 in words is "six hundred eighty-seven million, three hundred eighty-two thousand, one hundred seventy-two".