98989897 has 4 divisors (see below), whose sum is σ = 99187200. Its totient is φ = 98792596.

The previous prime is 98989889. The next prime is 98989903. The reversal of 98989897 is 79898989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79898989 = 1373 ⋅58193.

It is a cyclic number.

It is not a de Polignac number, because 98989897 - 2³ = 98989889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98989697) 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, 97897 + ... + 98902.

It is an arithmetic number, because the mean of its divisors is an integer number (24796800).

Almost surely, 2^98989897 is an apocalyptic number.

It is an amenable number.

98989897 is a deficient number, since it is larger than the sum of its proper divisors (197303).

98989897 is a wasteful number, since it uses less digits than its factorization.

98989897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197302.

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

The square root of 98989897 is about 9949.3666632605. The cubic root of 98989897 is about 462.5907639739.

The spelling of 98989897 in words is "ninety-eight million, nine hundred eighty-nine thousand, eight hundred ninety-seven".