99980399 has 2 divisors, whose sum is σ = 99980400. Its totient is φ = 99980398.

The previous prime is 99980357. The next prime is 99980431. The reversal of 99980399 is 99308999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99980399 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99980329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990199 + 49990200.

It is an arithmetic number, because the mean of its divisors is an integer number (49990200).

Almost surely, 2^99980399 is an apocalyptic number.

99980399 is a deficient number, since it is larger than the sum of its proper divisors (1).

99980399 is an equidigital number, since it uses as much as digits as its factorization.

99980399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417176, while the sum is 56.

The square root of 99980399 is about 9999.0199019704. The cubic root of 99980399 is about 464.1285547854.

The spelling of 99980399 in words is "ninety-nine million, nine hundred eighty thousand, three hundred ninety-nine".