99828691 has 2 divisors, whose sum is σ = 99828692. Its totient is φ = 99828690.

The previous prime is 99828683. The next prime is 99828697. The reversal of 99828691 is 19682899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99828691 - 2³ = 99828683 is a prime.

It is not a weakly prime, because it can be changed into another prime (99828697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49914345 + 49914346.

It is an arithmetic number, because the mean of its divisors is an integer number (49914346).

Almost surely, 2^99828691 is an apocalyptic number.

99828691 is a deficient number, since it is larger than the sum of its proper divisors (1).

99828691 is an equidigital number, since it uses as much as digits as its factorization.

99828691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 52.

The square root of 99828691 is about 9991.4308785078. The cubic root of 99828691 is about 463.8936832192.

The spelling of 99828691 in words is "ninety-nine million, eight hundred twenty-eight thousand, six hundred ninety-one".