65123687 has 4 divisors (see below), whose sum is σ = 65151840. Its totient is φ = 65095536.

The previous prime is 65123671. The next prime is 65123693. The reversal of 65123687 is 78632156.

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 65123687 - 2⁴ = 65123671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65123687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65123287) 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, 10262 + ... + 15347.

It is an arithmetic number, because the mean of its divisors is an integer number (16287960).

Almost surely, 2^65123687 is an apocalyptic number.

65123687 is a deficient number, since it is larger than the sum of its proper divisors (28153).

65123687 is a wasteful number, since it uses less digits than its factorization.

65123687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28152.

The product of its digits is 60480, while the sum is 38.

The square root of 65123687 is about 8069.9248447554. The cubic root of 65123687 is about 402.3274458072.

The spelling of 65123687 in words is "sixty-five million, one hundred twenty-three thousand, six hundred eighty-seven".