687674739 has 8 divisors (see below), whose sum is σ = 917228800. Its totient is φ = 458285256.

The previous prime is 687674737. The next prime is 687674747. The reversal of 687674739 is 937476786.

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

It is not a de Polignac number, because 687674739 - 2¹ = 687674737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687674737) 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, 31039 + ... + 48360.

It is an arithmetic number, because the mean of its divisors is an integer number (114653600).

Almost surely, 2^687674739 is an apocalyptic number.

687674739 is a deficient number, since it is larger than the sum of its proper divisors (229554061).

687674739 is a wasteful number, since it uses less digits than its factorization.

687674739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82289.

The product of its digits is 10668672, while the sum is 57.

The square root of 687674739 is about 26223.5531345392. The cubic root of 687674739 is about 882.6618519868.

It can be divided in two parts, 6876747 and 39, that added together give a palindrome (6876786).

The spelling of 687674739 in words is "six hundred eighty-seven million, six hundred seventy-four thousand, seven hundred thirty-nine".