91095640 has 32 divisors (see below), whose sum is σ = 213878880. Its totient is φ = 34853632.

The previous prime is 91095619. The next prime is 91095643. The reversal of 91095640 is 4659019.

It is a junction number, because it is equal to n+sod(n) for n = 91095596 and 91095605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91095643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48589 + ... + 50428.

It is an arithmetic number, because the mean of its divisors is an integer number (6683715).

Almost surely, 2^91095640 is an apocalyptic number.

It is an amenable number.

91095640 is an abundant number, since it is smaller than the sum of its proper divisors (122783240).

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

91095640 is a wasteful number, since it uses less digits than its factorization.

91095640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99051 (or 99047 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 91095640 is about 9544.4035958251. The cubic root of 91095640 is about 449.9516655905.

The spelling of 91095640 in words is "ninety-one million, ninety-five thousand, six hundred forty".