129290549 has 2 divisors, whose sum is σ = 129290550. Its totient is φ = 129290548.

The previous prime is 129290533. The next prime is 129290569. The reversal of 129290549 is 945092921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105719524 + 23571025 = 10282^2 + 4855^2 .

It is a cyclic number.

It is not a de Polignac number, because 129290549 - 2⁴ = 129290533 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129290569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64645274 + 64645275.

It is an arithmetic number, because the mean of its divisors is an integer number (64645275).

Almost surely, 2^129290549 is an apocalyptic number.

It is an amenable number.

129290549 is a deficient number, since it is larger than the sum of its proper divisors (1).

129290549 is an equidigital number, since it uses as much as digits as its factorization.

129290549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 129290549 is about 11370.6002040350. The cubic root of 129290549 is about 505.6564987306.

The spelling of 129290549 in words is "one hundred twenty-nine million, two hundred ninety thousand, five hundred forty-nine".