91158041 has 4 divisors (see below), whose sum is σ = 98170212. Its totient is φ = 84145872.

The previous prime is 91158037. The next prime is 91158043. The reversal of 91158041 is 14085119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14085119 = 149 ⋅94531.

It can be written as a sum of positive squares in 2 ways, for example, as 51782416 + 39375625 = 7196^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 91158041 - 2² = 91158037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91157995 and 91158013.

It is not an unprimeable number, because it can be changed into a prime (91158043) 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, 3506066 + ... + 3506091.

It is an arithmetic number, because the mean of its divisors is an integer number (24542553).

Almost surely, 2^91158041 is an apocalyptic number.

It is an amenable number.

91158041 is a deficient number, since it is larger than the sum of its proper divisors (7012171).

91158041 is a wasteful number, since it uses less digits than its factorization.

91158041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012170.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 91158041 is about 9547.6720199219. The cubic root of 91158041 is about 450.0543819051.

The spelling of 91158041 in words is "ninety-one million, one hundred fifty-eight thousand, forty-one".