129355913 has 8 divisors (see below), whose sum is σ = 130549320. Its totient is φ = 128168320.

The previous prime is 129355903. The next prime is 129355931. The reversal of 129355913 is 319553921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5968249 + 123387664 = 2443^2 + 11108^2 .

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 129355913 - 2¹⁶ = 129290377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129355903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51773 + ... + 54213.

It is an arithmetic number, because the mean of its divisors is an integer number (16318665).

Almost surely, 2^129355913 is an apocalyptic number.

It is an amenable number.

129355913 is a deficient number, since it is larger than the sum of its proper divisors (1193407).

129355913 is a wasteful number, since it uses less digits than its factorization.

129355913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907.

The product of its digits is 36450, while the sum is 38.

The square root of 129355913 is about 11373.4740954556. The cubic root of 129355913 is about 505.7416974383.

The spelling of 129355913 in words is "one hundred twenty-nine million, three hundred fifty-five thousand, nine hundred thirteen".