67890791 has 4 divisors (see below), whose sum is σ = 68005872. Its totient is φ = 67775712.

The previous prime is 67890787. The next prime is 67890799. The reversal of 67890791 is 19709876.

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 67890791 - 2² = 67890787 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 (67890799) 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, 56651 + ... + 57836.

It is an arithmetic number, because the mean of its divisors is an integer number (17001468).

Almost surely, 2^67890791 is an apocalyptic number.

67890791 is a deficient number, since it is larger than the sum of its proper divisors (115081).

67890791 is a wasteful number, since it uses less digits than its factorization.

67890791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115080.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 67890791 is about 8239.5868221653. The cubic root of 67890791 is about 407.9468865084.

The spelling of 67890791 in words is "sixty-seven million, eight hundred ninety thousand, seven hundred ninety-one".