99270557 has 2 divisors, whose sum is σ = 99270558. Its totient is φ = 99270556.

The previous prime is 99270539. The next prime is 99270559. The reversal of 99270557 is 75507299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 21724921 = 8806^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 99270557 - 2¹⁴ = 99254173 is a prime.

Together with 99270559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99270559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49635278 + 49635279.

It is an arithmetic number, because the mean of its divisors is an integer number (49635279).

Almost surely, 2^99270557 is an apocalyptic number.

It is an amenable number.

99270557 is a deficient number, since it is larger than the sum of its proper divisors (1).

99270557 is an equidigital number, since it uses as much as digits as its factorization.

99270557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 99270557 is about 9963.4610954226. The cubic root of 99270557 is about 463.0275365480.

The spelling of 99270557 in words is "ninety-nine million, two hundred seventy thousand, five hundred fifty-seven".