91854481 has 2 divisors, whose sum is σ = 91854482. Its totient is φ = 91854480.

The previous prime is 91854463. The next prime is 91854517. The reversal of 91854481 is 18445819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54154881 + 37699600 = 7359^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 91854481 - 2⁹ = 91853969 is a prime.

It is a super-2 number, since 2×91854481² = 16874491359558722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91854431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45927240 + 45927241.

It is an arithmetic number, because the mean of its divisors is an integer number (45927241).

Almost surely, 2^91854481 is an apocalyptic number.

It is an amenable number.

91854481 is a deficient number, since it is larger than the sum of its proper divisors (1).

91854481 is an equidigital number, since it uses as much as digits as its factorization.

91854481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 40.

The square root of 91854481 is about 9584.0743423661. The cubic root of 91854481 is about 451.1976017202.

The spelling of 91854481 in words is "ninety-one million, eight hundred fifty-four thousand, four hundred eighty-one".