99378893 has 2 divisors, whose sum is σ = 99378894. Its totient is φ = 99378892.

The previous prime is 99378887. The next prime is 99378931. The reversal of 99378893 is 39887399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88868329 + 10510564 = 9427^2 + 3242^2 .

It is a cyclic number.

It is not a de Polignac number, because 99378893 - 2²² = 95184589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99378803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49689446 + 49689447.

It is an arithmetic number, because the mean of its divisors is an integer number (49689447).

Almost surely, 2^99378893 is an apocalyptic number.

It is an amenable number.

99378893 is a deficient number, since it is larger than the sum of its proper divisors (1).

99378893 is an equidigital number, since it uses as much as digits as its factorization.

99378893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 56.

The square root of 99378893 is about 9968.8962779236. The cubic root of 99378893 is about 463.1959124692.

The spelling of 99378893 in words is "ninety-nine million, three hundred seventy-eight thousand, eight hundred ninety-three".