99888157 has 2 divisors, whose sum is σ = 99888158. Its totient is φ = 99888156.

The previous prime is 99888143. The next prime is 99888179. The reversal of 99888157 is 75188899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84254041 + 15634116 = 9179^2 + 3954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99888157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99888098 and 99888107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99888457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49944078 + 49944079.

It is an arithmetic number, because the mean of its divisors is an integer number (49944079).

Almost surely, 2^99888157 is an apocalyptic number.

It is an amenable number.

99888157 is a deficient number, since it is larger than the sum of its proper divisors (1).

99888157 is an equidigital number, since it uses as much as digits as its factorization.

99888157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 55.

The square root of 99888157 is about 9994.4062855179. The cubic root of 99888157 is about 463.9857757357.

It can be divided in two parts, 9988 and 8157, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 99888157 in words is "ninety-nine million, eight hundred eighty-eight thousand, one hundred fifty-seven".