99406999 has 4 divisors (see below), whose sum is σ = 99435600. Its totient is φ = 99378400.

The previous prime is 99406997. The next prime is 99407023. The reversal of 99406999 is 99960499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99960499 = 251 ⋅398249.

It is a cyclic number.

It is not a de Polignac number, because 99406999 - 2¹ = 99406997 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 (99406997) 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, 8227 + ... + 16324.

It is an arithmetic number, because the mean of its divisors is an integer number (24858900).

Almost surely, 2^99406999 is an apocalyptic number.

99406999 is a deficient number, since it is larger than the sum of its proper divisors (28601).

99406999 is a wasteful number, since it uses less digits than its factorization.

99406999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28600.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The square root of 99406999 is about 9970.3058629111. The cubic root of 99406999 is about 463.2395748500.

The spelling of 99406999 in words is "ninety-nine million, four hundred six thousand, nine hundred ninety-nine".