67142639 has 8 divisors (see below), whose sum is σ = 72258768. Its totient is φ = 62156160.

The previous prime is 67142633. The next prime is 67142659. The reversal of 67142639 is 93624176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67142639 - 2⁴ = 67142623 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 (67142633) 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 7 ways as a sum of consecutive naturals, for example, 31337 + ... + 33410.

It is an arithmetic number, because the mean of its divisors is an integer number (9032346).

Almost surely, 2^67142639 is an apocalyptic number.

67142639 is a deficient number, since it is larger than the sum of its proper divisors (5116129).

67142639 is a wasteful number, since it uses less digits than its factorization.

67142639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64825.

The product of its digits is 54432, while the sum is 38.

The square root of 67142639 is about 8194.0612030909. The cubic root of 67142639 is about 406.4428321947.

The spelling of 67142639 in words is "sixty-seven million, one hundred forty-two thousand, six hundred thirty-nine".