129390251949 has 12 divisors (see below), whose sum is σ = 213596606496. Its totient is φ = 73937286792.

The previous prime is 129390251917. The next prime is 129390251953. The reversal of 129390251949 is 949152093921.

It is not a de Polignac number, because 129390251949 - 2⁵ = 129390251917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129390251895 and 129390251904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129390259949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1026906699 + ... + 1026906824.

It is an arithmetic number, because the mean of its divisors is an integer number (17799717208).

Almost surely, 2^129390251949 is an apocalyptic number.

It is an amenable number.

129390251949 is a deficient number, since it is larger than the sum of its proper divisors (84206354547).

129390251949 is a wasteful number, since it uses less digits than its factorization.

129390251949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053813536 (or 2053813533 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 129390251949 in words is "one hundred twenty-nine billion, three hundred ninety million, two hundred fifty-one thousand, nine hundred forty-nine".