89997973 has 4 divisors (see below), whose sum is σ = 96920908. Its totient is φ = 83075040.

The previous prime is 89997923. The next prime is 89997989. The reversal of 89997973 is 37979998.

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 3470769 + 86527204 = 1863^2 + 9302^2 .

It is a cyclic number.

It is not a de Polignac number, because 89997973 - 2⁹ = 89997461 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 (89997923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3461448 + ... + 3461473.

It is an arithmetic number, because the mean of its divisors is an integer number (24230227).

Almost surely, 2^89997973 is an apocalyptic number.

It is an amenable number.

89997973 is a deficient number, since it is larger than the sum of its proper divisors (6922935).

89997973 is a wasteful number, since it uses less digits than its factorization.

89997973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6922934.

The product of its digits is 7715736, while the sum is 61.

The square root of 89997973 is about 9486.7261476233. The cubic root of 89997973 is about 448.1371102573.

The spelling of 89997973 in words is "eighty-nine million, nine hundred ninety-seven thousand, nine hundred seventy-three".