687307061 has 8 divisors (see below), whose sum is σ = 785970240. Its totient is φ = 588763008.

The previous prime is 687307057. The next prime is 687307063. The reversal of 687307061 is 160703786.

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 687307061 - 2² = 687307057 is a prime.

It is a super-2 number, since 2×687307061² = 944781992200915442, 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 (687307063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17051 + ... + 40808.

It is an arithmetic number, because the mean of its divisors is an integer number (98246280).

Almost surely, 2^687307061 is an apocalyptic number.

It is an amenable number.

687307061 is a deficient number, since it is larger than the sum of its proper divisors (98663179).

687307061 is a wasteful number, since it uses less digits than its factorization.

687307061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59563.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 687307061 is about 26216.5417437159. The cubic root of 687307061 is about 882.5045134551.

The spelling of 687307061 in words is "six hundred eighty-seven million, three hundred seven thousand, sixty-one".