99804157 has 2 divisors, whose sum is σ = 99804158. Its totient is φ = 99804156.

The previous prime is 99804149. The next prime is 99804179. The reversal of 99804157 is 75140899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 1179396 = 9931^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 99804157 - 2³ = 99804149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99804197) 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, 49902078 + 49902079.

It is an arithmetic number, because the mean of its divisors is an integer number (49902079).

Almost surely, 2^99804157 is an apocalyptic number.

It is an amenable number.

99804157 is a deficient number, since it is larger than the sum of its proper divisors (1).

99804157 is an equidigital number, since it uses as much as digits as its factorization.

99804157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 99804157 is about 9990.2030509895. The cubic root of 99804157 is about 463.8556777788.

The spelling of 99804157 in words is "ninety-nine million, eight hundred four thousand, one hundred fifty-seven".