67042879 has 4 divisors (see below), whose sum is σ = 67082184. Its totient is φ = 67003576.

The previous prime is 67042841. The next prime is 67042889. The reversal of 67042879 is 97824076.

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-67042879 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 (67042889) 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, 16972 + ... + 20545.

It is an arithmetic number, because the mean of its divisors is an integer number (16770546).

Almost surely, 2^67042879 is an apocalyptic number.

67042879 is a deficient number, since it is larger than the sum of its proper divisors (39305).

67042879 is a wasteful number, since it uses less digits than its factorization.

67042879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39304.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 67042879 is about 8187.9716047383. The cubic root of 67042879 is about 406.2414359062.

The spelling of 67042879 in words is "sixty-seven million, forty-two thousand, eight hundred seventy-nine".