99888857 has 2 divisors, whose sum is σ = 99888858. Its totient is φ = 99888856.

The previous prime is 99888827. The next prime is 99888869. The reversal of 99888857 is 75888899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76230361 + 23658496 = 8731^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 99888857 - 2²² = 95694553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99888857.

It is not a weakly prime, because it can be changed into another prime (99888827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49944428 + 49944429.

It is an arithmetic number, because the mean of its divisors is an integer number (49944429).

Almost surely, 2^99888857 is an apocalyptic number.

It is an amenable number.

99888857 is a deficient number, since it is larger than the sum of its proper divisors (1).

99888857 is an equidigital number, since it uses as much as digits as its factorization.

99888857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 62.

The square root of 99888857 is about 9994.4413050455. The cubic root of 99888857 is about 463.9868595788.

The spelling of 99888857 in words is "ninety-nine million, eight hundred eighty-eight thousand, eight hundred fifty-seven".