129938212949 has 2 divisors, whose sum is σ = 129938212950. Its totient is φ = 129938212948.

The previous prime is 129938212897. The next prime is 129938212951. The reversal of 129938212949 is 949212839921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89745180625 + 40193032324 = 299575^2 + 200482^2 .

It is a cyclic number.

It is not a de Polignac number, because 129938212949 - 2²⁴ = 129921435733 is a prime.

Together with 129938212951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129938212549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64969106474 + 64969106475.

It is an arithmetic number, because the mean of its divisors is an integer number (64969106475).

Almost surely, 2^129938212949 is an apocalyptic number.

It is an amenable number.

129938212949 is a deficient number, since it is larger than the sum of its proper divisors (1).

129938212949 is an equidigital number, since it uses as much as digits as its factorization.

129938212949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 59.

The spelling of 129938212949 in words is "one hundred twenty-nine billion, nine hundred thirty-eight million, two hundred twelve thousand, nine hundred forty-nine".