129800401 has 2 divisors, whose sum is σ = 129800402. Its totient is φ = 129800400.

The previous prime is 129800387. The next prime is 129800443. The reversal of 129800401 is 104008921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66438801 + 63361600 = 8151^2 + 7960^2 .

It is a cyclic number.

It is not a de Polignac number, because 129800401 - 2⁵ = 129800369 is a prime.

It is not a weakly prime, because it can be changed into another prime (129800471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64900200 + 64900201.

It is an arithmetic number, because the mean of its divisors is an integer number (64900201).

Almost surely, 2^129800401 is an apocalyptic number.

It is an amenable number.

129800401 is a deficient number, since it is larger than the sum of its proper divisors (1).

129800401 is an equidigital number, since it uses as much as digits as its factorization.

129800401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 129800401 is about 11392.9978934431. The cubic root of 129800401 is about 506.3203055130.

The spelling of 129800401 in words is "one hundred twenty-nine million, eight hundred thousand, four hundred one".