129320535 has 16 divisors (see below), whose sum is σ = 207203040. Its totient is φ = 68874240.

The previous prime is 129320533. The next prime is 129320539. The reversal of 129320535 is 535023921.

It is not a de Polignac number, because 129320535 - 2¹ = 129320533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129320533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5751 + ... + 17079.

It is an arithmetic number, because the mean of its divisors is an integer number (12950190).

Almost surely, 2^129320535 is an apocalyptic number.

129320535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129320535 is a deficient number, since it is larger than the sum of its proper divisors (77882505).

129320535 is a wasteful number, since it uses less digits than its factorization.

129320535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12098.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 129320535 is about 11371.9187035434. The cubic root of 129320535 is about 505.6955875473.

The spelling of 129320535 in words is "one hundred twenty-nine million, three hundred twenty thousand, five hundred thirty-five".