129027553 has 2 divisors, whose sum is σ = 129027554. Its totient is φ = 129027552.

The previous prime is 129027529. The next prime is 129027589. The reversal of 129027553 is 355720921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125059489 + 3968064 = 11183^2 + 1992^2 .

It is a cyclic number.

It is not a de Polignac number, because 129027553 - 2¹³ = 129019361 is a prime.

It is not a weakly prime, because it can be changed into another prime (129027253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64513776 + 64513777.

It is an arithmetic number, because the mean of its divisors is an integer number (64513777).

Almost surely, 2^129027553 is an apocalyptic number.

It is an amenable number.

129027553 is a deficient number, since it is larger than the sum of its proper divisors (1).

129027553 is an equidigital number, since it uses as much as digits as its factorization.

129027553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 129027553 is about 11359.0295800302. The cubic root of 129027553 is about 505.3134060854.

The spelling of 129027553 in words is "one hundred twenty-nine million, twenty-seven thousand, five hundred fifty-three".