129191053 has 2 divisors, whose sum is σ = 129191054. Its totient is φ = 129191052.

The previous prime is 129191011. The next prime is 129191057. The reversal of 129191053 is 350191921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113167044 + 16024009 = 10638^2 + 4003^2 .

It is an emirp because it is prime and its reverse (350191921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129191053 - 2¹⁷ = 129059981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129191057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64595526 + 64595527.

It is an arithmetic number, because the mean of its divisors is an integer number (64595527).

Almost surely, 2^129191053 is an apocalyptic number.

It is an amenable number.

129191053 is a deficient number, since it is larger than the sum of its proper divisors (1).

129191053 is an equidigital number, since it uses as much as digits as its factorization.

129191053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 129191053 is about 11366.2242191504. The cubic root of 129191053 is about 505.5267555268.

The spelling of 129191053 in words is "one hundred twenty-nine million, one hundred ninety-one thousand, fifty-three".