67312687 has 32 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 55624320.

The previous prime is 67312607. The next prime is 67312691. The reversal of 67312687 is 78621376.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67312687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67312607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451689 + ... + 451837.

It is an arithmetic number, because the mean of its divisors is an integer number (2520000).

Almost surely, 2^67312687 is an apocalyptic number.

67312687 is a deficient number, since it is larger than the sum of its proper divisors (13327313).

67312687 is a wasteful number, since it uses less digits than its factorization.

67312687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its digits is 84672, while the sum is 40.

The square root of 67312687 is about 8204.4309369998. The cubic root of 67312687 is about 406.7856671211.

The spelling of 67312687 in words is "sixty-seven million, three hundred twelve thousand, six hundred eighty-seven".