91140605 has 16 divisors (see below), whose sum is σ = 114445440. Its totient is φ = 69546048.

The previous prime is 91140601. The next prime is 91140613. The reversal of 91140605 is 50604119.

It is a cyclic number.

It is not a de Polignac number, because 91140605 - 2² = 91140601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91140601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50051 + ... + 51839.

It is an arithmetic number, because the mean of its divisors is an integer number (7152840).

Almost surely, 2^91140605 is an apocalyptic number.

It is an amenable number.

91140605 is a deficient number, since it is larger than the sum of its proper divisors (23304835).

91140605 is a wasteful number, since it uses less digits than its factorization.

91140605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 91140605 is about 9546.7588740892. The cubic root of 91140605 is about 450.0256857766.

The spelling of 91140605 in words is "ninety-one million, one hundred forty thousand, six hundred five".