129444479249 has 2 divisors, whose sum is σ = 129444479250. Its totient is φ = 129444479248.

The previous prime is 129444479231. The next prime is 129444479357. The reversal of 129444479249 is 942974444921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114883713025 + 14560766224 = 338945^2 + 120668^2 .

It is a cyclic number.

It is not a de Polignac number, because 129444479249 - 2¹⁶ = 129444413713 is a prime.

It is not a weakly prime, because it can be changed into another prime (129444479149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64722239624 + 64722239625.

It is an arithmetic number, because the mean of its divisors is an integer number (64722239625).

Almost surely, 2^129444479249 is an apocalyptic number.

It is an amenable number.

129444479249 is a deficient number, since it is larger than the sum of its proper divisors (1).

129444479249 is an equidigital number, since it uses as much as digits as its factorization.

129444479249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 59.

The spelling of 129444479249 in words is "one hundred twenty-nine billion, four hundred forty-four million, four hundred seventy-nine thousand, two hundred forty-nine".