98778897 has 24 divisors (see below), whose sum is σ = 163937280. Its totient is φ = 56142720.

The previous prime is 98778893. The next prime is 98778899. The reversal of 98778897 is 79887789.

It is not a de Polignac number, because 98778897 - 2² = 98778893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (98778893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7929 + ... + 16137.

It is an arithmetic number, because the mean of its divisors is an integer number (6830720).

Almost surely, 2^98778897 is an apocalyptic number.

It is an amenable number.

98778897 is a deficient number, since it is larger than the sum of its proper divisors (65158383).

98778897 is a wasteful number, since it uses less digits than its factorization.

98778897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8413 (or 8410 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 63.

The square root of 98778897 is about 9938.7573166870. The cubic root of 98778897 is about 462.2618547050.

The spelling of 98778897 in words is "ninety-eight million, seven hundred seventy-eight thousand, eight hundred ninety-seven".