99297691 has 4 divisors (see below), whose sum is σ = 100925584. Its totient is φ = 97669800.

The previous prime is 99297641. The next prime is 99297703. The reversal of 99297691 is 19679299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19679299 = 4099 ⋅4801.

It is a cyclic number.

It is not a de Polignac number, because 99297691 - 2¹³ = 99289499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99297641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813855 + ... + 813976.

It is an arithmetic number, because the mean of its divisors is an integer number (25231396).

Almost surely, 2^99297691 is an apocalyptic number.

99297691 is a deficient number, since it is larger than the sum of its proper divisors (1627893).

99297691 is a wasteful number, since it uses less digits than its factorization.

99297691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627892.

The product of its digits is 551124, while the sum is 52.

The square root of 99297691 is about 9964.8226778001. The cubic root of 99297691 is about 463.0697197324.

The spelling of 99297691 in words is "ninety-nine million, two hundred ninety-seven thousand, six hundred ninety-one".