129409137 has 64 divisors (see below), whose sum is σ = 227915520. Its totient is φ = 72135360.

The previous prime is 129409129. The next prime is 129409141. The reversal of 129409137 is 731904921.

It is not a de Polignac number, because 129409137 - 2³ = 129409129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129409127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 467043 + ... + 467319.

It is an arithmetic number, because the mean of its divisors is an integer number (3561180).

Almost surely, 2^129409137 is an apocalyptic number.

It is an amenable number.

129409137 is a deficient number, since it is larger than the sum of its proper divisors (98506383).

129409137 is a wasteful number, since it uses less digits than its factorization.

129409137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 129409137 is about 11375.8136851831. The cubic root of 129409137 is about 505.8110510652.

The spelling of 129409137 in words is "one hundred twenty-nine million, four hundred nine thousand, one hundred thirty-seven".