687241627 has 4 divisors (see below), whose sum is σ = 688745896. Its totient is φ = 685737360.

The previous prime is 687241601. The next prime is 687241649. The reversal of 687241627 is 726142786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 726142786 = 2 ⋅363071393.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687241627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687221627) 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, 751449 + ... + 752362.

It is an arithmetic number, because the mean of its divisors is an integer number (172186474).

Almost surely, 2^687241627 is an apocalyptic number.

687241627 is a deficient number, since it is larger than the sum of its proper divisors (1504269).

687241627 is a wasteful number, since it uses less digits than its factorization.

687241627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504268.

The product of its digits is 225792, while the sum is 43.

The square root of 687241627 is about 26215.2937614668. The cubic root of 687241627 is about 882.4765067430.

The spelling of 687241627 in words is "six hundred eighty-seven million, two hundred forty-one thousand, six hundred twenty-seven".