99684766931 has 2 divisors, whose sum is σ = 99684766932. Its totient is φ = 99684766930.

The previous prime is 99684766903. The next prime is 99684766997. The reversal of 99684766931 is 13966748699.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13966748699) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99684766931 is a prime.

It is a super-2 number, since 2×99684766931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99684786931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49842383465 + 49842383466.

It is an arithmetic number, because the mean of its divisors is an integer number (49842383466).

Almost surely, 2^99684766931 is an apocalyptic number.

99684766931 is a deficient number, since it is larger than the sum of its proper divisors (1).

99684766931 is an equidigital number, since it uses as much as digits as its factorization.

99684766931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 68.

The spelling of 99684766931 in words is "ninety-nine billion, six hundred eighty-four million, seven hundred sixty-six thousand, nine hundred thirty-one".