129477017 has 4 divisors (see below), whose sum is σ = 129499776. Its totient is φ = 129454260.

The previous prime is 129477011. The next prime is 129477041. The reversal of 129477017 is 710774921.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 129477017 - 2⁸ = 129476761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129477011) 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 3 ways as a sum of consecutive naturals, for example, 5588 + ... + 17034.

It is an arithmetic number, because the mean of its divisors is an integer number (32374944).

Almost surely, 2^129477017 is an apocalyptic number.

It is an amenable number.

129477017 is a deficient number, since it is larger than the sum of its proper divisors (22759).

129477017 is a wasteful number, since it uses less digits than its factorization.

129477017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22758.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 129477017 is about 11378.7968168871. The cubic root of 129477017 is about 505.8994746326.

The spelling of 129477017 in words is "one hundred twenty-nine million, four hundred seventy-seven thousand, seventeen".