129098447 has 2 divisors, whose sum is σ = 129098448. Its totient is φ = 129098446.

The previous prime is 129098443. The next prime is 129098461. The reversal of 129098447 is 744890921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129098447 - 2² = 129098443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129098398 and 129098407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129098441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64549223 + 64549224.

It is an arithmetic number, because the mean of its divisors is an integer number (64549224).

Almost surely, 2^129098447 is an apocalyptic number.

129098447 is a deficient number, since it is larger than the sum of its proper divisors (1).

129098447 is an equidigital number, since it uses as much as digits as its factorization.

129098447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 129098447 is about 11362.1497525776. The cubic root of 129098447 is about 505.4059370441.

The spelling of 129098447 in words is "one hundred twenty-nine million, ninety-eight thousand, four hundred forty-seven".