91109701 has 4 divisors (see below), whose sum is σ = 91234732. Its totient is φ = 90984672.

The previous prime is 91109687. The next prime is 91109717. The reversal of 91109701 is 10790119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71740900 + 19368801 = 8470^2 + 4401^2 .

It is a cyclic number.

It is not a de Polignac number, because 91109701 - 2⁷ = 91109573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91109701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91109761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61416 + ... + 62881.

It is an arithmetic number, because the mean of its divisors is an integer number (22808683).

Almost surely, 2^91109701 is an apocalyptic number.

It is an amenable number.

91109701 is a deficient number, since it is larger than the sum of its proper divisors (125031).

91109701 is a wasteful number, since it uses less digits than its factorization.

91109701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125030.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 91109701 is about 9545.1401770744. The cubic root of 91109701 is about 449.9748150514.

The spelling of 91109701 in words is "ninety-one million, one hundred nine thousand, seven hundred one".