687645141 has 8 divisors (see below), whose sum is σ = 917040480. Its totient is φ = 458339952.

The previous prime is 687645137. The next prime is 687645143. The reversal of 687645141 is 141546786.

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

It is not a de Polignac number, because 687645141 - 2² = 687645137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687645093 and 687645102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687645143) 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, 2086 + ... + 37143.

It is an arithmetic number, because the mean of its divisors is an integer number (114630060).

Almost surely, 2^687645141 is an apocalyptic number.

It is an amenable number.

687645141 is a deficient number, since it is larger than the sum of its proper divisors (229395339).

687645141 is a wasteful number, since it uses less digits than its factorization.

687645141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45075.

The product of its digits is 161280, while the sum is 42.

The square root of 687645141 is about 26222.9887884657. The cubic root of 687645141 is about 882.6491883447.

It can be divided in two parts, 687645 and 141, that added together give a palindrome (687786).

The spelling of 687645141 in words is "six hundred eighty-seven million, six hundred forty-five thousand, one hundred forty-one".