67287427 has 4 divisors (see below), whose sum is σ = 67311000. Its totient is φ = 67263856.

The previous prime is 67287421. The next prime is 67287431. The reversal of 67287427 is 72478276.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67287427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67287421) 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, 6802 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (16827750).

Almost surely, 2^67287427 is an apocalyptic number.

67287427 is a deficient number, since it is larger than the sum of its proper divisors (23573).

67287427 is a wasteful number, since it uses less digits than its factorization.

67287427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23572.

The product of its digits is 263424, while the sum is 43.

The square root of 67287427 is about 8202.8913804829. The cubic root of 67287427 is about 406.7347768060.

The spelling of 67287427 in words is "sixty-seven million, two hundred eighty-seven thousand, four hundred twenty-seven".