99913643 has 2 divisors, whose sum is σ = 99913644. Its totient is φ = 99913642.

The previous prime is 99913637. The next prime is 99913661. The reversal of 99913643 is 34631999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99913643 - 2²² = 95719339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99913594 and 99913603.

It is not a weakly prime, because it can be changed into another prime (99913673) 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, 49956821 + 49956822.

It is an arithmetic number, because the mean of its divisors is an integer number (49956822).

Almost surely, 2^99913643 is an apocalyptic number.

99913643 is a deficient number, since it is larger than the sum of its proper divisors (1).

99913643 is an equidigital number, since it uses as much as digits as its factorization.

99913643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 99913643 is about 9995.6812174058. The cubic root of 99913643 is about 464.0252336530.

The spelling of 99913643 in words is "ninety-nine million, nine hundred thirteen thousand, six hundred forty-three".