91380041 has 4 divisors (see below), whose sum is σ = 92218500. Its totient is φ = 90541584.

The previous prime is 91380019. The next prime is 91380059. The reversal of 91380041 is 14008319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14008319 = 13 ⋅1077563.

It can be written as a sum of positive squares in 2 ways, for example, as 35952016 + 55428025 = 5996^2 + 7445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91380041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91380001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419066 + ... + 419283.

It is an arithmetic number, because the mean of its divisors is an integer number (23054625).

Almost surely, 2^91380041 is an apocalyptic number.

It is an amenable number.

91380041 is a deficient number, since it is larger than the sum of its proper divisors (838459).

91380041 is a wasteful number, since it uses less digits than its factorization.

91380041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838458.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 91380041 is about 9559.2908209762. The cubic root of 91380041 is about 450.4194295188.

The spelling of 91380041 in words is "ninety-one million, three hundred eighty thousand, forty-one".