129873513 has 32 divisors (see below), whose sum is σ = 223349760. Its totient is φ = 65136960.

The previous prime is 129873481. The next prime is 129873529. The reversal of 129873513 is 315378921.

It is not a de Polignac number, because 129873513 - 2⁵ = 129873481 is a prime.

It is a super-2 number, since 2×129873513² = 33734258757922338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129873533) 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, 2995 + ... + 16392.

It is an arithmetic number, because the mean of its divisors is an integer number (6979680).

Almost surely, 2^129873513 is an apocalyptic number.

It is an amenable number.

129873513 is a deficient number, since it is larger than the sum of its proper divisors (93476247).

129873513 is a wasteful number, since it uses less digits than its factorization.

129873513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19437.

The product of its digits is 45360, while the sum is 39.

The square root of 129873513 is about 11396.2060792178. The cubic root of 129873513 is about 506.4153518091.

The spelling of 129873513 in words is "one hundred twenty-nine million, eight hundred seventy-three thousand, five hundred thirteen".