99693889 has 2 divisors, whose sum is σ = 99693890. Its totient is φ = 99693888.

The previous prime is 99693877. The next prime is 99693917. The reversal of 99693889 is 98839699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84327489 + 15366400 = 9183^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 99693889 - 2⁷ = 99693761 is a prime.

It is not a weakly prime, because it can be changed into another prime (99693829) 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, 49846944 + 49846945.

It is an arithmetic number, because the mean of its divisors is an integer number (49846945).

Almost surely, 2^99693889 is an apocalyptic number.

It is an amenable number.

99693889 is a deficient number, since it is larger than the sum of its proper divisors (1).

99693889 is an equidigital number, since it uses as much as digits as its factorization.

99693889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 61.

The square root of 99693889 is about 9984.6827190452. The cubic root of 99693889 is about 463.6847854766.

The spelling of 99693889 in words is "ninety-nine million, six hundred ninety-three thousand, eight hundred eighty-nine".