91741861 has 4 divisors (see below), whose sum is σ = 96570400. Its totient is φ = 86913324.

The previous prime is 91741849. The next prime is 91741889. The reversal of 91741861 is 16814719.

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: 16814719 = 181 ⋅92899.

It is a cyclic number.

It is not a de Polignac number, because 91741861 - 2¹⁹ = 91217573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91741861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91741561) 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, 2414241 + ... + 2414278.

It is an arithmetic number, because the mean of its divisors is an integer number (24142600).

Almost surely, 2^91741861 is an apocalyptic number.

91741861 is the 4284-th centered decagonal number.

It is an amenable number.

91741861 is a deficient number, since it is larger than the sum of its proper divisors (4828539).

91741861 is a wasteful number, since it uses less digits than its factorization.

91741861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828538.

The product of its digits is 12096, while the sum is 37.

The square root of 91741861 is about 9578.1971685699. The cubic root of 91741861 is about 451.0131263971.

It can be divided in two parts, 917 and 41861, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 91741861 in words is "ninety-one million, seven hundred forty-one thousand, eight hundred sixty-one".