91010 has 16 divisors (see below), whose sum is σ = 172800. Its totient is φ = 34416.

The previous prime is 91009. The next prime is 91019. The reversal of 91010 is 1019.

It is a junction number, because it is equal to n+sod(n) for n = 90982 and 91000.

It is not an unprimeable number, because it can be changed into a prime (91019) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 50 + ... + 429.

It is an arithmetic number, because the mean of its divisors is an integer number (10800).

2⁹¹⁰¹⁰ is an apocalyptic number.

91010 is a deficient number, since it is larger than the sum of its proper divisors (81790).

91010 is a wasteful number, since it uses less digits than its factorization.

91010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 91010 is about 301.6786369632. The cubic root of 91010 is about 44.9810619900.

Adding to 91010 its reverse (1019), we get a palindrome (92029).

The spelling of 91010 in words is "ninety-one thousand, ten".