687464919399 has 8 divisors (see below), whose sum is σ = 929176329712. Its totient is φ = 452031727680.

The previous prime is 687464919391. The next prime is 687464919451. The reversal of 687464919399 is 993919464786.

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

It is not a de Polignac number, because 687464919399 - 2³ = 687464919391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 687464919399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687464919391) 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, 1569554392 + ... + 1569554829.

It is an arithmetic number, because the mean of its divisors is an integer number (116147041214).

Almost surely, 2^687464919399 is an apocalyptic number.

687464919399 is a deficient number, since it is larger than the sum of its proper divisors (241711410313).

687464919399 is a wasteful number, since it uses less digits than its factorization.

687464919399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139109297.

The product of its digits is 634894848, while the sum is 75.

The spelling of 687464919399 in words is "six hundred eighty-seven billion, four hundred sixty-four million, nine hundred nineteen thousand, three hundred ninety-nine".