687174079 has 4 divisors (see below), whose sum is σ = 693845776. Its totient is φ = 680502384.

The previous prime is 687174077. The next prime is 687174109. The reversal of 687174079 is 970471786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 970471786 = 2 ⋅485235893.

It is a cyclic number.

It is not a de Polignac number, because 687174079 - 2¹ = 687174077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687174071) 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, 3335694 + ... + 3335899.

It is an arithmetic number, because the mean of its divisors is an integer number (173461444).

Almost surely, 2^687174079 is an apocalyptic number.

687174079 is a deficient number, since it is larger than the sum of its proper divisors (6671697).

687174079 is a wasteful number, since it uses less digits than its factorization.

687174079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671696.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 687174079 is about 26214.0053978784. The cubic root of 687174079 is about 882.4475933430.

The spelling of 687174079 in words is "six hundred eighty-seven million, one hundred seventy-four thousand, seventy-nine".