99906521863 has 2 divisors, whose sum is σ = 99906521864. Its totient is φ = 99906521862.

The previous prime is 99906521831. The next prime is 99906521873. The reversal of 99906521863 is 36812560999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99906521863 - 2⁵ = 99906521831 is a prime.

It is a super-2 number, since 2×99906521863² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99906521798 and 99906521807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99906521873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49953260931 + 49953260932.

It is an arithmetic number, because the mean of its divisors is an integer number (49953260932).

Almost surely, 2^99906521863 is an apocalyptic number.

99906521863 is a deficient number, since it is larger than the sum of its proper divisors (1).

99906521863 is an equidigital number, since it uses as much as digits as its factorization.

99906521863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 99906521863 in words is "ninety-nine billion, nine hundred six million, five hundred twenty-one thousand, eight hundred sixty-three".