91070 has 16 divisors (see below), whose sum is σ = 187488. Its totient is φ = 31200.

The previous prime is 91033. The next prime is 91079. The reversal of 91070 is 7019.

91070 = 33² + 34² + ... + 67².

It is a fibodiv number, since the Fibonacci-like sequence with seeds 910 and 70 contains 91070 itself.

It is a Curzon number.

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 91070.

It is not an unprimeable number, because it can be changed into a prime (91079) by changing a digit.

91070 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581 + ... + 720.

It is an arithmetic number, because the mean of its divisors is an integer number (11718).

2⁹¹⁰⁷⁰ is an apocalyptic number.

91070 is an abundant number, since it is smaller than the sum of its proper divisors (96418).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93744).

91070 is a wasteful number, since it uses less digits than its factorization.

91070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315.

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 91070 is about 301.7780641465. The cubic root of 91070 is about 44.9909446800.

Adding to 91070 its reverse (7019), we get a palindrome (98089).

The spelling of 91070 in words is "ninety-one thousand, seventy".