99138405 has 8 divisors (see below), whose sum is σ = 158621472. Its totient is φ = 52873808.

The previous prime is 99138397. The next prime is 99138419. The reversal of 99138405 is 50483199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99138405 - 2³ = 99138397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3304599 + ... + 3304628.

It is an arithmetic number, because the mean of its divisors is an integer number (19827684).

Almost surely, 2^99138405 is an apocalyptic number.

It is an amenable number.

99138405 is a deficient number, since it is larger than the sum of its proper divisors (59483067).

99138405 is a wasteful number, since it uses less digits than its factorization.

99138405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6609235.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 99138405 is about 9956.8270548403. The cubic root of 99138405 is about 462.8219798363.

The spelling of 99138405 in words is "ninety-nine million, one hundred thirty-eight thousand, four hundred five".