99828557 has 2 divisors, whose sum is σ = 99828558. Its totient is φ = 99828556.

The previous prime is 99828551. The next prime is 99828569. The reversal of 99828557 is 75582899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65383396 + 34445161 = 8086^2 + 5869^2 .

It is a cyclic number.

It is not a de Polignac number, because 99828557 - 2⁶ = 99828493 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99828499 and 99828508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99828551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49914278 + 49914279.

It is an arithmetic number, because the mean of its divisors is an integer number (49914279).

Almost surely, 2^99828557 is an apocalyptic number.

It is an amenable number.

99828557 is a deficient number, since it is larger than the sum of its proper divisors (1).

99828557 is an equidigital number, since it uses as much as digits as its factorization.

99828557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 53.

The square root of 99828557 is about 9991.4241727594. The cubic root of 99828557 is about 463.8934756577.

The spelling of 99828557 in words is "ninety-nine million, eight hundred twenty-eight thousand, five hundred fifty-seven".