91840741 has 2 divisors, whose sum is σ = 91840742. Its totient is φ = 91840740.

The previous prime is 91840717. The next prime is 91840747. The reversal of 91840741 is 14704819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72743841 + 19096900 = 8529^2 + 4370^2 .

It is a cyclic number.

It is not a de Polignac number, because 91840741 - 2¹⁹ = 91316453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91840697 and 91840706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91840747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45920370 + 45920371.

It is an arithmetic number, because the mean of its divisors is an integer number (45920371).

Almost surely, 2^91840741 is an apocalyptic number.

It is an amenable number.

91840741 is a deficient number, since it is larger than the sum of its proper divisors (1).

91840741 is an equidigital number, since it uses as much as digits as its factorization.

91840741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 91840741 is about 9583.3575014188. The cubic root of 91840741 is about 451.1751032199.

The spelling of 91840741 in words is "ninety-one million, eight hundred forty thousand, seven hundred forty-one".