91741789 has 4 divisors (see below), whose sum is σ = 92442240. Its totient is φ = 91041340.

The previous prime is 91741787. The next prime is 91741813. The reversal of 91741789 is 98714719.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98714719 = 379 ⋅260461.

It is a cyclic number.

It is not a de Polignac number, because 91741789 - 2¹ = 91741787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91741787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350029 + ... + 350290.

It is an arithmetic number, because the mean of its divisors is an integer number (23110560).

Almost surely, 2^91741789 is an apocalyptic number.

It is an amenable number.

91741789 is a deficient number, since it is larger than the sum of its proper divisors (700451).

91741789 is a wasteful number, since it uses less digits than its factorization.

91741789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700450.

The product of its digits is 127008, while the sum is 46.

The square root of 91741789 is about 9578.1934100330. The cubic root of 91741789 is about 451.0130084104.

The spelling of 91741789 in words is "ninety-one million, seven hundred forty-one thousand, seven hundred eighty-nine".