687071603 has 4 divisors (see below), whose sum is σ = 688449000. Its totient is φ = 685694208.

The previous prime is 687071599. The next prime is 687071629. The reversal of 687071603 is 306170786.

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 687071603 - 2² = 687071599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687071653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687950 + ... + 688947.

It is an arithmetic number, because the mean of its divisors is an integer number (172112250).

Almost surely, 2^687071603 is an apocalyptic number.

687071603 is a deficient number, since it is larger than the sum of its proper divisors (1377397).

687071603 is a wasteful number, since it uses less digits than its factorization.

687071603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377396.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 687071603 is about 26212.0507209947. The cubic root of 687071603 is about 882.4037256643.

The spelling of 687071603 in words is "six hundred eighty-seven million, seventy-one thousand, six hundred three".