99949797 has 12 divisors (see below), whose sum is σ = 149029504. Its totient is φ = 64483560.

The previous prime is 99949771. The next prime is 99949813. The reversal of 99949797 is 79794999.

It is not a de Polignac number, because 99949797 - 2⁷ = 99949669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99941797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178843 + ... + 179400.

Almost surely, 2^99949797 is an apocalyptic number.

It is an amenable number.

99949797 is a deficient number, since it is larger than the sum of its proper divisors (49079707).

99949797 is a wasteful number, since it uses less digits than its factorization.

99949797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358280 (or 358277 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 63.

The square root of 99949797 is about 9997.4895348782. The cubic root of 99949797 is about 464.0811964647.

It can be divided in two parts, 9994 and 9797, that added together give a palindrome (19791).

The spelling of 99949797 in words is "ninety-nine million, nine hundred forty-nine thousand, seven hundred ninety-seven".