91010100 has 36 divisors (see below), whose sum is σ = 263323424. Its totient is φ = 24269280.

The previous prime is 91010093. The next prime is 91010113. The reversal of 91010100 is 101019.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 151384 + ... + 151983.

Almost surely, 2^91010100 is an apocalyptic number.

It is an amenable number.

91010100 is an abundant number, since it is smaller than the sum of its proper divisors (172313324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91010100 is a wasteful number, since it uses less digits than its factorization.

91010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303384 (or 303377 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 91010100 is about 9539.9213833239. The cubic root of 91010100 is about 449.8107846477.

Adding to 91010100 its reverse (101019), we get a palindrome (91111119).

The spelling of 91010100 in words is "ninety-one million, ten thousand, one hundred".