687450134 has 32 divisors (see below), whose sum is σ = 1244121600. Its totient is φ = 279076104.

The previous prime is 687450109. The next prime is 687450139. The reversal of 687450134 is 431054786.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687450139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92447 + ... + 99605.

It is an arithmetic number, because the mean of its divisors is an integer number (38878800).

Almost surely, 2^687450134 is an apocalyptic number.

687450134 is a deficient number, since it is larger than the sum of its proper divisors (556671466).

687450134 is an equidigital number, since it uses as much as digits as its factorization.

687450134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7225 (or 7187 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 687450134 is about 26219.2702797008. The cubic root of 687450134 is about 882.5657446065.

The spelling of 687450134 in words is "six hundred eighty-seven million, four hundred fifty thousand, one hundred thirty-four".