97898989 has 4 divisors (see below), whose sum is σ = 99277920. Its totient is φ = 96520060.

The previous prime is 97898987. The next prime is 97899031. The reversal of 97898989 is 98989879.

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.

It is a cyclic number.

It is not a de Polignac number, because 97898989 - 2¹ = 97898987 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 (97898981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689359 + ... + 689500.

It is an arithmetic number, because the mean of its divisors is an integer number (24819480).

Almost surely, 2^97898989 is an apocalyptic number.

It is an amenable number.

97898989 is a deficient number, since it is larger than the sum of its proper divisors (1378931).

97898989 is a wasteful number, since it uses less digits than its factorization.

97898989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378930.

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

The square root of 97898989 is about 9894.3917953556. The cubic root of 97898989 is about 460.8851717649.

The spelling of 97898989 in words is "ninety-seven million, eight hundred ninety-eight thousand, nine hundred eighty-nine".