99641291 has 2 divisors, whose sum is σ = 99641292. Its totient is φ = 99641290.

The previous prime is 99641257. The next prime is 99641293. The reversal of 99641291 is 19214699.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99641291 - 2¹⁴ = 99624907 is a prime.

Together with 99641293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99641293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49820645 + 49820646.

It is an arithmetic number, because the mean of its divisors is an integer number (49820646).

Almost surely, 2^99641291 is an apocalyptic number.

99641291 is a deficient number, since it is larger than the sum of its proper divisors (1).

99641291 is an equidigital number, since it uses as much as digits as its factorization.

99641291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 41.

The square root of 99641291 is about 9982.0484370694. The cubic root of 99641291 is about 463.6032252025.

The spelling of 99641291 in words is "ninety-nine million, six hundred forty-one thousand, two hundred ninety-one".