91000010 has 16 divisors (see below), whose sum is σ = 164413800. Its totient is φ = 36263616.

The previous prime is 91000009. The next prime is 91000027. The reversal of 91000010 is 1000019.

It can be written as a sum of positive squares in 4 ways, for example, as 61199329 + 29800681 = 7823^2 + 5459^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90999955 and 91000000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14225 + ... + 19604.

Almost surely, 2^91000010 is an apocalyptic number.

91000010 is a deficient number, since it is larger than the sum of its proper divisors (73413790).

91000010 is a wasteful number, since it uses less digits than its factorization.

91000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34105.

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

The square root of 91000010 is about 9539.3925383119. The cubic root of 91000010 is about 449.7941610035.

Adding to 91000010 its reverse (1000019), we get a palindrome (92000029).

The spelling of 91000010 in words is "ninety-one million, ten", and thus it is an aban number and an uban number.