99807946171 has 2 divisors, whose sum is σ = 99807946172. Its totient is φ = 99807946170.

The previous prime is 99807946151. The next prime is 99807946201. The reversal of 99807946171 is 17164970899.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99807946171 is a prime.

It is a super-2 number, since 2×99807946171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99807946111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49903973085 + 49903973086.

It is an arithmetic number, because the mean of its divisors is an integer number (49903973086).

Almost surely, 2^99807946171 is an apocalyptic number.

99807946171 is a deficient number, since it is larger than the sum of its proper divisors (1).

99807946171 is an equidigital number, since it uses as much as digits as its factorization.

99807946171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 99807946171 in words is "ninety-nine billion, eight hundred seven million, nine hundred forty-six thousand, one hundred seventy-one".