129916801 has 4 divisors (see below), whose sum is σ = 148476352. Its totient is φ = 111357252.

The previous prime is 129916793. The next prime is 129916837. The reversal of 129916801 is 108619921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 108619921 = 97 ⋅1119793.

It is a cyclic number.

It is not a de Polignac number, because 129916801 - 2³ = 129916793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129911801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9279765 + ... + 9279778.

It is an arithmetic number, because the mean of its divisors is an integer number (37119088).

Almost surely, 2^129916801 is an apocalyptic number.

It is an amenable number.

129916801 is a deficient number, since it is larger than the sum of its proper divisors (18559551).

129916801 is an equidigital number, since it uses as much as digits as its factorization.

129916801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18559550.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 129916801 is about 11398.1051495413. The cubic root of 129916801 is about 506.4716098100.

The spelling of 129916801 in words is "one hundred twenty-nine million, nine hundred sixteen thousand, eight hundred one".