99378897 has 16 divisors (see below), whose sum is σ = 134830080. Its totient is φ = 65100672.

The previous prime is 99378893. The next prime is 99378931. The reversal of 99378897 is 79887399.

It is a happy number.

It is not a de Polignac number, because 99378897 - 2² = 99378893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99378897.

It is not an unprimeable number, because it can be changed into a prime (99378893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40333 + ... + 42725.

It is an arithmetic number, because the mean of its divisors is an integer number (8426880).

Almost surely, 2^99378897 is an apocalyptic number.

It is an amenable number.

99378897 is a deficient number, since it is larger than the sum of its proper divisors (35451183).

99378897 is a wasteful number, since it uses less digits than its factorization.

99378897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632.

The product of its digits is 6858432, while the sum is 60.

The square root of 99378897 is about 9968.8964785477. The cubic root of 99378897 is about 463.1959186837.

The spelling of 99378897 in words is "ninety-nine million, three hundred seventy-eight thousand, eight hundred ninety-seven".