129513769 has 32 divisors (see below), whose sum is σ = 172302336. Its totient is φ = 94245120.

The previous prime is 129513733. The next prime is 129513799. The reversal of 129513769 is 967315921.

It is a cyclic number.

It is not a de Polignac number, because 129513769 - 2²⁵ = 95959337 is a prime.

It is a super-2 number, since 2×129513769² = 33547632721170722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129513719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213064 + ... + 213670.

It is an arithmetic number, because the mean of its divisors is an integer number (5384448).

Almost surely, 2^129513769 is an apocalyptic number.

It is an amenable number.

129513769 is a deficient number, since it is larger than the sum of its proper divisors (42788567).

129513769 is a wasteful number, since it uses less digits than its factorization.

129513769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 102060, while the sum is 43.

The square root of 129513769 is about 11380.4116357889. The cubic root of 129513769 is about 505.9473365595.

The spelling of 129513769 in words is "one hundred twenty-nine million, five hundred thirteen thousand, seven hundred sixty-nine".