89973869 has 2 divisors, whose sum is σ = 89973870. Its totient is φ = 89973868.

The previous prime is 89973847. The next prime is 89973893. The reversal of 89973869 is 96837998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 19245769 = 8410^2 + 4387^2 .

It is a cyclic number.

It is not a de Polignac number, because 89973869 - 2⁸ = 89973613 is a prime.

It is a super-2 number, since 2×89973869² = 16190594205658322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89970869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44986934 + 44986935.

It is an arithmetic number, because the mean of its divisors is an integer number (44986935).

Almost surely, 2^89973869 is an apocalyptic number.

It is an amenable number.

89973869 is a deficient number, since it is larger than the sum of its proper divisors (1).

89973869 is an equidigital number, since it uses as much as digits as its factorization.

89973869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 89973869 is about 9485.4556558976. The cubic root of 89973869 is about 448.0970987584.

The spelling of 89973869 in words is "eighty-nine million, nine hundred seventy-three thousand, eight hundred sixty-nine".