99649787 has 2 divisors, whose sum is σ = 99649788. Its totient is φ = 99649786.

The previous prime is 99649763. The next prime is 99649789. The reversal of 99649787 is 78794699.

It is a strong prime.

It is an emirp because it is prime and its reverse (78794699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99649787 - 2²⁶ = 32540923 is a prime.

Together with 99649789, 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 (99649789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49824893 + 49824894.

It is an arithmetic number, because the mean of its divisors is an integer number (49824894).

Almost surely, 2^99649787 is an apocalyptic number.

99649787 is a deficient number, since it is larger than the sum of its proper divisors (1).

99649787 is an equidigital number, since it uses as much as digits as its factorization.

99649787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 59.

The square root of 99649787 is about 9982.4739919521. The cubic root of 99649787 is about 463.6164013366.

The spelling of 99649787 in words is "ninety-nine million, six hundred forty-nine thousand, seven hundred eighty-seven".