129986519 has 6 divisors (see below), whose sum is σ = 140754816. Its totient is φ = 119987400.

The previous prime is 129986509. The next prime is 129986561. The reversal of 129986519 is 915689921.

It is not a de Polignac number, because 129986519 - 2²⁰ = 128937943 is a prime.

It is a super-2 number, since 2×129986519² = 33792990243474722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129986509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 384407 + ... + 384744.

It is an arithmetic number, because the mean of its divisors is an integer number (23459136).

Almost surely, 2^129986519 is an apocalyptic number.

129986519 is a deficient number, since it is larger than the sum of its proper divisors (10768297).

129986519 is an equidigital number, since it uses as much as digits as its factorization.

129986519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769177 (or 769164 counting only the distinct ones).

The product of its digits is 349920, while the sum is 50.

The square root of 129986519 is about 11401.1630547063. The cubic root of 129986519 is about 506.5621905331.

The spelling of 129986519 in words is "one hundred twenty-nine million, nine hundred eighty-six thousand, five hundred nineteen".