99999407 has 4 divisors (see below), whose sum is σ = 100020936. Its totient is φ = 99977880.

The previous prime is 99999401. The next prime is 99999437. The reversal of 99999407 is 70499999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99999407 - 2⁶ = 99999343 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 (99999401) 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, 593 + ... + 14154.

It is an arithmetic number, because the mean of its divisors is an integer number (25005234).

Almost surely, 2^99999407 is an apocalyptic number.

99999407 is a deficient number, since it is larger than the sum of its proper divisors (21529).

99999407 is a wasteful number, since it uses less digits than its factorization.

99999407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21528.

The product of its (nonzero) digits is 1653372, while the sum is 56.

The square root of 99999407 is about 9999.9703499560. The cubic root of 99999407 is about 464.1579658721.

The spelling of 99999407 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred seven".