99638836169 has 2 divisors, whose sum is σ = 99638836170. Its totient is φ = 99638836168.

The previous prime is 99638836133. The next prime is 99638836183. The reversal of 99638836169 is 96163883699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64091504569 + 35547331600 = 253163^2 + 188540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99638836169 is a prime.

It is a super-2 number, since 2×99638836169² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99638836099 and 99638836108.

It is not a weakly prime, because it can be changed into another prime (99638836669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49819418084 + 49819418085.

It is an arithmetic number, because the mean of its divisors is an integer number (49819418085).

Almost surely, 2^99638836169 is an apocalyptic number.

It is an amenable number.

99638836169 is a deficient number, since it is larger than the sum of its proper divisors (1).

99638836169 is an equidigital number, since it uses as much as digits as its factorization.

99638836169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90699264, while the sum is 68.

The spelling of 99638836169 in words is "ninety-nine billion, six hundred thirty-eight million, eight hundred thirty-six thousand, one hundred sixty-nine".