89280133 has 6 divisors (see below), whose sum is σ = 89658834. Its totient is φ = 88902864.

The previous prime is 89280097. The next prime is 89280151. The reversal of 89280133 is 33108298.

It can be written as a sum of positive squares in 3 ways, for example, as 59490369 + 29789764 = 7713^2 + 5458^2 .

It is not a de Polignac number, because 89280133 - 2⁹ = 89279621 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 (89280173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121435 + ... + 122167.

It is an arithmetic number, because the mean of its divisors is an integer number (14943139).

Almost surely, 2^89280133 is an apocalyptic number.

It is an amenable number.

89280133 is a deficient number, since it is larger than the sum of its proper divisors (378701).

89280133 is an frugal number, since it uses more digits than its factorization.

89280133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 89280133 is about 9448.8164867353. The cubic root of 89280133 is about 446.9424543096.

The spelling of 89280133 in words is "eighty-nine million, two hundred eighty thousand, one hundred thirty-three".