99381379 has 2 divisors, whose sum is σ = 99381380. Its totient is φ = 99381378.

The previous prime is 99381341. The next prime is 99381421. The reversal of 99381379 is 97318399.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99381379 - 2¹³ = 99373187 is a prime.

It is not a weakly prime, because it can be changed into another prime (99381179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49690689 + 49690690.

It is an arithmetic number, because the mean of its divisors is an integer number (49690690).

Almost surely, 2^99381379 is an apocalyptic number.

99381379 is a deficient number, since it is larger than the sum of its proper divisors (1).

99381379 is an equidigital number, since it uses as much as digits as its factorization.

99381379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 99381379 is about 9969.0209649694. The cubic root of 99381379 is about 463.1997747763.

The spelling of 99381379 in words is "ninety-nine million, three hundred eighty-one thousand, three hundred seventy-nine".