687189350399 has 4 divisors (see below), whose sum is σ = 687361108800. Its totient is φ = 687017592000.

The previous prime is 687189350363. The next prime is 687189350459. The reversal of 687189350399 is 993053981786.

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

It is a cyclic number.

It is not a de Polignac number, because 687189350399 - 2²⁰ = 687188301823 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 (687189350359) 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, 85873199 + ... + 85881200.

It is an arithmetic number, because the mean of its divisors is an integer number (171840277200).

Almost surely, 2^687189350399 is an apocalyptic number.

687189350399 is a deficient number, since it is larger than the sum of its proper divisors (171758401).

687189350399 is a wasteful number, since it uses less digits than its factorization.

687189350399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171758400.

The product of its (nonzero) digits is 88179840, while the sum is 68.

The spelling of 687189350399 in words is "six hundred eighty-seven billion, one hundred eighty-nine million, three hundred fifty thousand, three hundred ninety-nine".