67091983 has 16 divisors (see below), whose sum is σ = 82437120. Its totient is φ = 53316576.

The previous prime is 67091939. The next prime is 67091987. The reversal of 67091983 is 38919076.

It is a cyclic number.

It is not a de Polignac number, because 67091983 - 2¹⁷ = 66960911 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 (67091987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 885 + ... + 11617.

It is an arithmetic number, because the mean of its divisors is an integer number (5152320).

Almost surely, 2^67091983 is an apocalyptic number.

67091983 is a deficient number, since it is larger than the sum of its proper divisors (15345137).

67091983 is a wasteful number, since it uses less digits than its factorization.

67091983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 67091983 is about 8190.9696007249. The cubic root of 67091983 is about 406.3405924042.

The spelling of 67091983 in words is "sixty-seven million, ninety-one thousand, nine hundred eighty-three".