91934109 has 10 divisors (see below), whose sum is σ = 137333790. Its totient is φ = 61289352.

The previous prime is 91934107. The next prime is 91934131. The reversal of 91934109 is 90143919.

It can be written as a sum of positive squares in only one way, i.e., 90668484 + 1265625 = 9522^2 + 1125^2 .

It is not a de Polignac number, because 91934109 - 2¹ = 91934107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91934107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 567414 + ... + 567575.

It is an arithmetic number, because the mean of its divisors is an integer number (13733379).

Almost surely, 2^91934109 is an apocalyptic number.

It is an amenable number.

91934109 is a deficient number, since it is larger than the sum of its proper divisors (45399681).

91934109 is a wasteful number, since it uses less digits than its factorization.

91934109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135001 (or 1134992 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 91934109 is about 9588.2276255834. The cubic root of 91934109 is about 451.3279440665.

The spelling of 91934109 in words is "ninety-one million, nine hundred thirty-four thousand, one hundred nine".