67871791 has 4 divisors (see below), whose sum is σ = 73092712. Its totient is φ = 62650872.

The previous prime is 67871789. The next prime is 67871809. The reversal of 67871791 is 19717876.

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 67871791 - 2¹ = 67871789 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 (67871291) 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, 2610441 + ... + 2610466.

It is an arithmetic number, because the mean of its divisors is an integer number (18273178).

Almost surely, 2^67871791 is an apocalyptic number.

67871791 is a deficient number, since it is larger than the sum of its proper divisors (5220921).

67871791 is a wasteful number, since it uses less digits than its factorization.

67871791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220920.

The product of its digits is 148176, while the sum is 46.

The square root of 67871791 is about 8238.4337710514. The cubic root of 67871791 is about 407.9088267858.

The spelling of 67871791 in words is "sixty-seven million, eight hundred seventy-one thousand, seven hundred ninety-one".