687005069 has 4 divisors (see below), whose sum is σ = 697258944. Its totient is φ = 676751196.

The previous prime is 687005051. The next prime is 687005089. The reversal of 687005069 is 960500786.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 687005069 - 2²⁴ = 670227853 is a prime.

It is a super-2 number, since 2×687005069² = 943951929663389522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687005089) 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, 5126837 + ... + 5126970.

It is an arithmetic number, because the mean of its divisors is an integer number (174314736).

Almost surely, 2^687005069 is an apocalyptic number.

It is an amenable number.

687005069 is a deficient number, since it is larger than the sum of its proper divisors (10253875).

687005069 is a wasteful number, since it uses less digits than its factorization.

687005069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253874.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 687005069 is about 26210.7815411903. The cubic root of 687005069 is about 882.3752416148.

The spelling of 687005069 in words is "six hundred eighty-seven million, five thousand, sixty-nine".