105128899 has 2 divisors, whose sum is σ = 105128900. Its totient is φ = 105128898.

The previous prime is 105128873. The next prime is 105128911. The reversal of 105128899 is 998821501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105128899 - 2²³ = 96740291 is a prime.

It is a super-2 number, since 2×105128899² = 22104170809904402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105128809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52564449 + 52564450.

It is an arithmetic number, because the mean of its divisors is an integer number (52564450).

Almost surely, 2^105128899 is an apocalyptic number.

105128899 is a deficient number, since it is larger than the sum of its proper divisors (1).

105128899 is an equidigital number, since it uses as much as digits as its factorization.

105128899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 105128899 is about 10253.2384640171. The cubic root of 105128899 is about 471.9623686244.

The spelling of 105128899 in words is "one hundred five million, one hundred twenty-eight thousand, eight hundred ninety-nine".