129151643 has 4 divisors (see below), whose sum is σ = 129477360. Its totient is φ = 128825928.

The previous prime is 129151639. The next prime is 129151657. The reversal of 129151643 is 346151921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129151643 - 2² = 129151639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129151613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162263 + ... + 163056.

It is an arithmetic number, because the mean of its divisors is an integer number (32369340).

Almost surely, 2^129151643 is an apocalyptic number.

129151643 is a deficient number, since it is larger than the sum of its proper divisors (325717).

129151643 is an equidigital number, since it uses as much as digits as its factorization.

129151643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325716.

The product of its digits is 6480, while the sum is 32.

The square root of 129151643 is about 11364.4904417224. The cubic root of 129151643 is about 505.4753463022.

The spelling of 129151643 in words is "one hundred twenty-nine million, one hundred fifty-one thousand, six hundred forty-three".