129948349 has 2 divisors, whose sum is σ = 129948350. Its totient is φ = 129948348.

The previous prime is 129948337. The next prime is 129948409. The reversal of 129948349 is 943849921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 11682724 = 10875^2 + 3418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129948349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129948319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64974174 + 64974175.

It is an arithmetic number, because the mean of its divisors is an integer number (64974175).

Almost surely, 2^129948349 is an apocalyptic number.

It is an amenable number.

129948349 is a deficient number, since it is larger than the sum of its proper divisors (1).

129948349 is an equidigital number, since it uses as much as digits as its factorization.

129948349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 129948349 is about 11399.4889797745. The cubic root of 129948349 is about 506.5126023864.

The spelling of 129948349 in words is "one hundred twenty-nine million, nine hundred forty-eight thousand, three hundred forty-nine".