99309641 has 2 divisors, whose sum is σ = 99309642. Its totient is φ = 99309640.

The previous prime is 99309577. The next prime is 99309649. The reversal of 99309641 is 14690399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51423241 + 47886400 = 7171^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 99309641 - 2⁶ = 99309577 is a prime.

It is a Chen prime.

It is equal to p_5723879 and since 99309641 and 5723879 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (99309649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49654820 + 49654821.

It is an arithmetic number, because the mean of its divisors is an integer number (49654821).

Almost surely, 2^99309641 is an apocalyptic number.

It is an amenable number.

99309641 is a deficient number, since it is larger than the sum of its proper divisors (1).

99309641 is an equidigital number, since it uses as much as digits as its factorization.

99309641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 99309641 is about 9965.4222690260. The cubic root of 99309641 is about 463.0882950592.

The spelling of 99309641 in words is "ninety-nine million, three hundred nine thousand, six hundred forty-one".