67870991 has 8 divisors (see below), whose sum is σ = 70341600. Its totient is φ = 65409120.

The previous prime is 67870973. The next prime is 67871039. The reversal of 67870991 is 19907876.

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 67870991 - 2⁶ = 67870927 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 (67870091) 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, 16445 + ... + 20153.

It is an arithmetic number, because the mean of its divisors is an integer number (8792700).

Almost surely, 2^67870991 is an apocalyptic number.

67870991 is a deficient number, since it is larger than the sum of its proper divisors (2470609).

67870991 is a wasteful number, since it uses less digits than its factorization.

67870991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369.

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

The square root of 67870991 is about 8238.3852179902. The cubic root of 67870991 is about 407.9072241153.

The spelling of 67870991 in words is "sixty-seven million, eight hundred seventy thousand, nine hundred ninety-one".