99757813 has 2 divisors, whose sum is σ = 99757814. Its totient is φ = 99757812.

The previous prime is 99757711. The next prime is 99757817. The reversal of 99757813 is 31875799.

99757813 = 7062² + 7063².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49885969 + 49871844 = 7063^2 + 7062^2 .

It is a cyclic number.

It is not a de Polignac number, because 99757813 - 2¹³ = 99749621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99757817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49878906 + 49878907.

It is an arithmetic number, because the mean of its divisors is an integer number (49878907).

Almost surely, 2^99757813 is an apocalyptic number.

99757813 is the 7063-rd centered square number.

It is an amenable number.

99757813 is a deficient number, since it is larger than the sum of its proper divisors (1).

99757813 is an equidigital number, since it uses as much as digits as its factorization.

99757813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The square root of 99757813 is about 9987.8833092903. The cubic root of 99757813 is about 463.7838696284.

The spelling of 99757813 in words is "ninety-nine million, seven hundred fifty-seven thousand, eight hundred thirteen".