102129899 has 2 divisors, whose sum is σ = 102129900. Its totient is φ = 102129898.

The previous prime is 102129877. The next prime is 102129943. The reversal of 102129899 is 998921201.

It is a weak prime.

It is an emirp because it is prime and its reverse (998921201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102129899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102129809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51064949 + 51064950.

It is an arithmetic number, because the mean of its divisors is an integer number (51064950).

Almost surely, 2^102129899 is an apocalyptic number.

102129899 is a deficient number, since it is larger than the sum of its proper divisors (1).

102129899 is an equidigital number, since it uses as much as digits as its factorization.

102129899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 102129899 is about 10105.9338509610. The cubic root of 102129899 is about 467.4311321053.

The spelling of 102129899 in words is "one hundred two million, one hundred twenty-nine thousand, eight hundred ninety-nine".