91007 has 4 divisors (see below), whose sum is σ = 104016.
Its totient is φ = 78000.
The previous prime is 90997. The next prime is 91009. The reversal of 91007 is 70019.
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 91007 - 210 = 89983 is a prime.
It is a Duffinian number.
It is a plaindrome in base 12.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91007.
It is not an unprimeable number, because it can be changed into a prime (91009) 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, 6494 + ... + 6507.
It is an arithmetic number, because the mean of its divisors is an integer number (26004).
291007 is an apocalyptic number.
91007 is a deficient number, since it is larger than the sum of its proper divisors (13009).
91007 is a wasteful number, since it uses less digits than its factorization.
91007 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 13008.
The product of its (nonzero) digits is 63, while the sum is 17.
The square root of 91007 is about 301.6736647439.
The cubic root of 91007 is about 44.9805677415.
The spelling of 91007 in words is "ninety-one thousand, seven".