99378305 has 8 divisors (see below), whose sum is σ = 128427432. Its totient is φ = 73387008.

The previous prime is 99378299. The next prime is 99378317. The reversal of 99378305 is 50387399.

It can be written as a sum of positive squares in 4 ways, for example, as 3984016 + 95394289 = 1996^2 + 9767^2 .

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 99378305 - 2⁶ = 99378241 is a prime.

It is a Duffinian 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, 764384 + ... + 764513.

It is an arithmetic number, because the mean of its divisors is an integer number (16053429).

Almost surely, 2^99378305 is an apocalyptic number.

It is an amenable number.

99378305 is a deficient number, since it is larger than the sum of its proper divisors (29049127).

99378305 is a wasteful number, since it uses less digits than its factorization.

99378305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528915.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 99378305 is about 9968.8667861498. The cubic root of 99378305 is about 463.1949989293.

The spelling of 99378305 in words is "ninety-nine million, three hundred seventy-eight thousand, three hundred five".