687273789103 has 4 divisors (see below), whose sum is σ = 749753224488. Its totient is φ = 624794353720.

The previous prime is 687273789011. The next prime is 687273789113. The reversal of 687273789103 is 301987372786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687273789103 is a prime.

It is a super-2 number, since 2×687273789103² (a number of 24 digits) contains 22 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 (687273789113) 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, 31239717676 + ... + 31239717697.

It is an arithmetic number, because the mean of its divisors is an integer number (187438306122).

Almost surely, 2^687273789103 is an apocalyptic number.

687273789103 is a deficient number, since it is larger than the sum of its proper divisors (62479435385).

687273789103 is a wasteful number, since it uses less digits than its factorization.

687273789103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62479435384.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 687273789103 in words is "six hundred eighty-seven billion, two hundred seventy-three million, seven hundred eighty-nine thousand, one hundred three".