129518137 has 8 divisors (see below), whose sum is σ = 148328576. Its totient is φ = 110784672.

The previous prime is 129518131. The next prime is 129518143. The reversal of 129518137 is 731815921.

It is an interprime number because it is at equal distance from previous prime (129518131) and next prime (129518143).

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 129518137 - 2⁷ = 129518009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129518096 and 129518105.

It is not an unprimeable number, because it can be changed into a prime (129518131) 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, 15588 + ... + 22405.

It is an arithmetic number, because the mean of its divisors is an integer number (18541072).

Almost surely, 2^129518137 is an apocalyptic number.

It is an amenable number.

129518137 is a deficient number, since it is larger than the sum of its proper divisors (18810439).

129518137 is an equidigital number, since it uses as much as digits as its factorization.

129518137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38487.

The product of its digits is 15120, while the sum is 37.

The square root of 129518137 is about 11380.6035428707. The cubic root of 129518137 is about 505.9530243798.

The spelling of 129518137 in words is "one hundred twenty-nine million, five hundred eighteen thousand, one hundred thirty-seven".