687161210 has 8 divisors (see below), whose sum is σ = 1236890196. Its totient is φ = 274864480.

The previous prime is 687161207. The next prime is 687161213. The reversal of 687161210 is 12161786.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (687161207) and next prime (687161213).

It can be written as a sum of positive squares in 2 ways, for example, as 686597209 + 564001 = 26203^2 + 751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (687161213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34358051 + ... + 34358070.

Almost surely, 2^687161210 is an apocalyptic number.

687161210 is a deficient number, since it is larger than the sum of its proper divisors (549728986).

687161210 is a wasteful number, since it uses less digits than its factorization.

687161210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68716128.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 687161210 is about 26213.7599363388. The cubic root of 687161210 is about 882.4420846520.

The spelling of 687161210 in words is "six hundred eighty-seven million, one hundred sixty-one thousand, two hundred ten".