67312771 has 4 divisors (see below), whose sum is σ = 67689000. Its totient is φ = 66936544.

The previous prime is 67312753. The next prime is 67312783. The reversal of 67312771 is 17721376.

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 67312771 - 2¹³ = 67304579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67312711) 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, 187846 + ... + 188203.

It is an arithmetic number, because the mean of its divisors is an integer number (16922250).

Almost surely, 2^67312771 is an apocalyptic number.

67312771 is a deficient number, since it is larger than the sum of its proper divisors (376229).

67312771 is a wasteful number, since it uses less digits than its factorization.

67312771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376228.

The product of its digits is 12348, while the sum is 34.

The square root of 67312771 is about 8204.4360561833. The cubic root of 67312771 is about 406.7858363313.

The spelling of 67312771 in words is "sixty-seven million, three hundred twelve thousand, seven hundred seventy-one".