99941909 has 2 divisors, whose sum is σ = 99941910. Its totient is φ = 99941908.

The previous prime is 99941893. The next prime is 99941939. The reversal of 99941909 is 90914999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52635025 + 47306884 = 7255^2 + 6878^2 .

It is a cyclic number.

It is not a de Polignac number, because 99941909 - 2⁴ = 99941893 is a 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 (99941939) 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, 49970954 + 49970955.

It is an arithmetic number, because the mean of its divisors is an integer number (49970955).

Almost surely, 2^99941909 is an apocalyptic number.

It is an amenable number.

99941909 is a deficient number, since it is larger than the sum of its proper divisors (1).

99941909 is an equidigital number, since it uses as much as digits as its factorization.

99941909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 99941909 is about 9997.0950280569. The cubic root of 99941909 is about 464.0689877730.

The spelling of 99941909 in words is "ninety-nine million, nine hundred forty-one thousand, nine hundred nine".