91558741 has 4 divisors (see below), whose sum is σ = 91671084. Its totient is φ = 91446400.

The previous prime is 91558721. The next prime is 91558751. The reversal of 91558741 is 14785519.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14785519 = 7 ⋅2112217.

It can be written as a sum of positive squares in 2 ways, for example, as 32729841 + 58828900 = 5721^2 + 7670^2 .

It is a cyclic number.

It is not a de Polignac number, because 91558741 - 2¹¹ = 91556693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91558694 and 91558703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91558721) 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, 54940 + ... + 56581.

It is an arithmetic number, because the mean of its divisors is an integer number (22917771).

Almost surely, 2^91558741 is an apocalyptic number.

It is an amenable number.

91558741 is a deficient number, since it is larger than the sum of its proper divisors (112343).

91558741 is a wasteful number, since it uses less digits than its factorization.

91558741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112342.

The product of its digits is 50400, while the sum is 40.

The square root of 91558741 is about 9568.6331834803. The cubic root of 91558741 is about 450.7128471339.

The spelling of 91558741 in words is "ninety-one million, five hundred fifty-eight thousand, seven hundred forty-one".