99980291 has 2 divisors, whose sum is σ = 99980292. Its totient is φ = 99980290.

The previous prime is 99980219. The next prime is 99980303. The reversal of 99980291 is 19208999.

Together with previous prime (99980219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99980291 - 2¹⁸ = 99718147 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99920291) 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, 49990145 + 49990146.

It is an arithmetic number, because the mean of its divisors is an integer number (49990146).

Almost surely, 2^99980291 is an apocalyptic number.

99980291 is a deficient number, since it is larger than the sum of its proper divisors (1).

99980291 is an equidigital number, since it uses as much as digits as its factorization.

99980291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 99980291 is about 9999.0145014396. The cubic root of 99980291 is about 464.1283876663.

The spelling of 99980291 in words is "ninety-nine million, nine hundred eighty thousand, two hundred ninety-one".