91489033 has 4 divisors (see below), whose sum is σ = 91512580. Its totient is φ = 91465488.

The previous prime is 91489007. The next prime is 91489037. The reversal of 91489033 is 33098419.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44195904 + 47293129 = 6648^2 + 6877^2 .

It is a cyclic number.

It is not a de Polignac number, because 91489033 - 2¹³ = 91480841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91488983 and 91489001.

It is not an unprimeable number, because it can be changed into a prime (91489037) 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, 4410 + ... + 14227.

It is an arithmetic number, because the mean of its divisors is an integer number (22878145).

Almost surely, 2^91489033 is an apocalyptic number.

It is an amenable number.

91489033 is a deficient number, since it is larger than the sum of its proper divisors (23547).

91489033 is a wasteful number, since it uses less digits than its factorization.

91489033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23546.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 91489033 is about 9564.9899634030. The cubic root of 91489033 is about 450.5984350906.

It can be divided in two parts, 9148 and 9033, that added together give a palindrome (18181).

The spelling of 91489033 in words is "ninety-one million, four hundred eighty-nine thousand, thirty-three".