687479071 has 8 divisors (see below), whose sum is σ = 723966320. Its totient is φ = 651022272.

The previous prime is 687479057. The next prime is 687479077. The reversal of 687479071 is 170974786.

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 687479071 - 2¹¹ = 687477023 is a prime.

It is a super-3 number, since 3×687479071³ (a number of 27 digits) contains 333 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 (687479077) 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, 49981 + ... + 62233.

It is an arithmetic number, because the mean of its divisors is an integer number (90495790).

Almost surely, 2^687479071 is an apocalyptic number.

687479071 is a deficient number, since it is larger than the sum of its proper divisors (36487249).

687479071 is a wasteful number, since it uses less digits than its factorization.

687479071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15225.

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

The square root of 687479071 is about 26219.8221008458. The cubic root of 687479071 is about 882.5781277818.

The spelling of 687479071 in words is "six hundred eighty-seven million, four hundred seventy-nine thousand, seventy-one".