67091 has 4 divisors (see below), whose sum is σ = 70032.
Its totient is φ = 64152.
The previous prime is 67079. The next prime is 67103. The reversal of 67091 is 19076.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (67079) and next prime (67103).
It is a cyclic number.
It is not a de Polignac number, because 67091 - 210 = 66067 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 2917 = 67091 / (6 + 7 + 0 + 9 + 1).
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (67021) 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, 1436 + ... + 1481.
It is an arithmetic number, because the mean of its divisors is an integer number (17508).
267091 is an apocalyptic number.
67091 is a deficient number, since it is larger than the sum of its proper divisors (2941).
67091 is a wasteful number, since it uses less digits than its factorization.
67091 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2940.
The product of its (nonzero) digits is 378, while the sum is 23.
The square root of 67091 is about 259.0193042999.
The cubic root of 67091 is about 40.6338607891.
The spelling of 67091 in words is "sixty-seven thousand, ninety-one".