99645787 has 2 divisors, whose sum is σ = 99645788. Its totient is φ = 99645786.

The previous prime is 99645761. The next prime is 99645797. The reversal of 99645787 is 78754699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99645787 is a prime.

It is not a weakly prime, because it can be changed into another prime (99645797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49822893 + 49822894.

It is an arithmetic number, because the mean of its divisors is an integer number (49822894).

Almost surely, 2^99645787 is an apocalyptic number.

99645787 is a deficient number, since it is larger than the sum of its proper divisors (1).

99645787 is an equidigital number, since it uses as much as digits as its factorization.

99645787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The square root of 99645787 is about 9982.2736388059. The cubic root of 99645787 is about 463.6101979769.

It can be divided in two parts, 9964 and 5787, that added together give a palindrome (15751).

The spelling of 99645787 in words is "ninety-nine million, six hundred forty-five thousand, seven hundred eighty-seven".