91072 has 14 divisors (see below), whose sum is σ = 180848. Its totient is φ = 45504.
The previous prime is 91033. The next prime is 91079. The reversal of 91072 is 27019.
It is a super-3 number, since 3×910723 = 2266083334815744, which contains 333 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (91079) by changing a digit.
91072 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648 + ... + 775.
291072 is an apocalyptic number.
It is an amenable number.
91072 is a deficient number, since it is larger than the sum of its proper divisors (89776).
91072 is a wasteful number, since it uses less digits than its factorization.
91072 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1435 (or 1425 counting only the distinct ones).
The product of its (nonzero) digits is 126, while the sum is 19.
The square root of 91072 is about 301.7813778218. The cubic root of 91072 is about 44.9912740282.
It can be divided in two parts, 9 and 1072, that added together give a triangular number (1081 = T46).
The spelling of 91072 in words is "ninety-one thousand, seventy-two".
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