99638836133 has 2 divisors, whose sum is σ = 99638836134. Its totient is φ = 99638836132.

The previous prime is 99638836103. The next prime is 99638836169. The reversal of 99638836133 is 33163883699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78499711684 + 21139124449 = 280178^2 + 145393^2 .

It is a cyclic number.

It is not a de Polignac number, because 99638836133 - 2¹⁸ = 99638573989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99638836103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49819418066 + 49819418067.

It is an arithmetic number, because the mean of its divisors is an integer number (49819418067).

Almost surely, 2^99638836133 is an apocalyptic number.

It is an amenable number.

99638836133 is a deficient number, since it is larger than the sum of its proper divisors (1).

99638836133 is an equidigital number, since it uses as much as digits as its factorization.

99638836133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 59.

The spelling of 99638836133 in words is "ninety-nine billion, six hundred thirty-eight million, eight hundred thirty-six thousand, one hundred thirty-three".