129629757949 has 4 divisors (see below), whose sum is σ = 130211057536. Its totient is φ = 129048458364.

The previous prime is 129629757931. The next prime is 129629757967. The reversal of 129629757949 is 949757926921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949757926921 = 7883 ⋅120481787.

It is an interprime number because it is at equal distance from previous prime (129629757931) and next prime (129629757967).

It is a cyclic number.

It is not a de Polignac number, because 129629757949 - 2³³ = 121039823357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129629757349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290649459 + ... + 290649904.

It is an arithmetic number, because the mean of its divisors is an integer number (32552764384).

Almost surely, 2^129629757949 is an apocalyptic number.

It is an amenable number.

129629757949 is a deficient number, since it is larger than the sum of its proper divisors (581299587).

129629757949 is an equidigital number, since it uses as much as digits as its factorization.

129629757949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581299586.

The product of its digits is 154314720, while the sum is 70.

The spelling of 129629757949 in words is "one hundred twenty-nine billion, six hundred twenty-nine million, seven hundred fifty-seven thousand, nine hundred forty-nine".