91900999101 has 24 divisors (see below), whose sum is σ = 128800051744. Its totient is φ = 58271653440.

The previous prime is 91900999093. The next prime is 91900999117. The reversal of 91900999101 is 10199900919.

It is not a de Polignac number, because 91900999101 - 2³ = 91900999093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91900999901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102790 + ... + 440871.

Almost surely, 2^91900999101 is an apocalyptic number.

It is an amenable number.

91900999101 is a deficient number, since it is larger than the sum of its proper divisors (36899052643).

91900999101 is a wasteful number, since it uses less digits than its factorization.

91900999101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543789 (or 543760 counting only the distinct ones).

The product of its (nonzero) digits is 59049, while the sum is 48.

The spelling of 91900999101 in words is "ninety-one billion, nine hundred million, nine hundred ninety-nine thousand, one hundred one".