129953477 has 8 divisors (see below), whose sum is σ = 133287000. Its totient is φ = 126627840.

The previous prime is 129953429. The next prime is 129953489. The reversal of 129953477 is 774359921.

It can be written as a sum of positive squares in 4 ways, for example, as 312481 + 129640996 = 559^2 + 11386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129953477 - 2⁶ = 129953413 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 (129953177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45899 + ... + 48647.

It is an arithmetic number, because the mean of its divisors is an integer number (16660875).

Almost surely, 2^129953477 is an apocalyptic number.

It is an amenable number.

129953477 is a deficient number, since it is larger than the sum of its proper divisors (3333523).

129953477 is a wasteful number, since it uses less digits than its factorization.

129953477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943.

The product of its digits is 476280, while the sum is 47.

The square root of 129953477 is about 11399.7138999187. The cubic root of 129953477 is about 506.5192649373.

The spelling of 129953477 in words is "one hundred twenty-nine million, nine hundred fifty-three thousand, four hundred seventy-seven".