89899897 has 2 divisors, whose sum is σ = 89899898. Its totient is φ = 89899896.

The previous prime is 89899853. The next prime is 89899933. The reversal of 89899897 is 79899898.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 389376 = 9461^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 89899897 - 2⁷ = 89899769 is a prime.

It is a super-2 number, since 2×89899897² = 16163982961221218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89899097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44949948 + 44949949.

It is an arithmetic number, because the mean of its divisors is an integer number (44949949).

Almost surely, 2^89899897 is an apocalyptic number.

It is an amenable number.

89899897 is a deficient number, since it is larger than the sum of its proper divisors (1).

89899897 is an equidigital number, since it uses as much as digits as its factorization.

89899897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 67.

The square root of 89899897 is about 9481.5556213102. Note that the first 3 decimals coincide. The cubic root of 89899897 is about 447.9742641067.

Subtracting from 89899897 its reverse (79899898), we obtain a palindrome (9999999).

The spelling of 89899897 in words is "eighty-nine million, eight hundred ninety-nine thousand, eight hundred ninety-seven".