129096641 has 4 divisors (see below), whose sum is σ = 129243072. Its totient is φ = 128950212.

The previous prime is 129096637. The next prime is 129096647. The reversal of 129096641 is 146690921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129096641 - 2² = 129096637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129096595 and 129096604.

It is not an unprimeable number, because it can be changed into a prime (129096647) 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, 71885 + ... + 73658.

It is an arithmetic number, because the mean of its divisors is an integer number (32310768).

Almost surely, 2^129096641 is an apocalyptic number.

It is an amenable number.

129096641 is a deficient number, since it is larger than the sum of its proper divisors (146431).

129096641 is an equidigital number, since it uses as much as digits as its factorization.

129096641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146430.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129096641 is about 11362.0702779027. The cubic root of 129096641 is about 505.4035802706.

The spelling of 129096641 in words is "one hundred twenty-nine million, ninety-six thousand, six hundred forty-one".