99986399 has 4 divisors (see below), whose sum is σ = 100510080. Its totient is φ = 99462720.

The previous prime is 99986353. The next prime is 99986423. The reversal of 99986399 is 99368999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99368999 = 1153 ⋅86183.

It is a cyclic number.

It is not a de Polignac number, because 99986399 - 2¹² = 99982303 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 (99986329) 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, 261554 + ... + 261935.

It is an arithmetic number, because the mean of its divisors is an integer number (25127520).

Almost surely, 2^99986399 is an apocalyptic number.

99986399 is a deficient number, since it is larger than the sum of its proper divisors (523681).

99986399 is a wasteful number, since it uses less digits than its factorization.

99986399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523680.

The product of its digits is 8503056, while the sum is 62.

The square root of 99986399 is about 9999.3199268750. The cubic root of 99986399 is about 464.1378389906.

The spelling of 99986399 in words is "ninety-nine million, nine hundred eighty-six thousand, three hundred ninety-nine".