686040487 has 4 divisors (see below), whose sum is σ = 748407816. Its totient is φ = 623673160.

The previous prime is 686040473. The next prime is 686040493. The reversal of 686040487 is 784040686.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 686040487 - 2⁷ = 686040359 is a prime.

It is a super-3 number, since 3×686040487³ (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 (686044487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31183648 + ... + 31183669.

It is an arithmetic number, because the mean of its divisors is an integer number (187101954).

Almost surely, 2^686040487 is an apocalyptic number.

686040487 is a deficient number, since it is larger than the sum of its proper divisors (62367329).

686040487 is a wasteful number, since it uses less digits than its factorization.

686040487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62367328.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 686040487 is about 26192.3745964355. The cubic root of 686040487 is about 881.9620850693.

The spelling of 686040487 in words is "six hundred eighty-six million, forty thousand, four hundred eighty-seven".