687480181 has 8 divisors (see below), whose sum is σ = 691030400. Its totient is φ = 683939808.

The previous prime is 687480163. The next prime is 687480191. The reversal of 687480181 is 181084786.

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 687480181 - 2¹³ = 687471989 is a prime.

It is a super-2 number, since 2×687480181² = 945257998535585522, 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 (687480191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165670 + ... + 169768.

It is an arithmetic number, because the mean of its divisors is an integer number (86378800).

Almost surely, 2^687480181 is an apocalyptic number.

It is an amenable number.

687480181 is a deficient number, since it is larger than the sum of its proper divisors (3550219).

687480181 is a wasteful number, since it uses less digits than its factorization.

687480181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 687480181 is about 26219.8432680289. The cubic root of 687480181 is about 882.5786027835.

The spelling of 687480181 in words is "six hundred eighty-seven million, four hundred eighty thousand, one hundred eighty-one".