129563893 has 4 divisors (see below), whose sum is σ = 129615948. Its totient is φ = 129511840.

The previous prime is 129563881. The next prime is 129563927. The reversal of 129563893 is 398365921.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 97278769 + 32285124 = 9863^2 + 5682^2 .

It is a cyclic number.

It is not a de Polignac number, because 129563893 - 2²¹ = 127466741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129563593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22096 + ... + 27337.

It is an arithmetic number, because the mean of its divisors is an integer number (32403987).

Almost surely, 2^129563893 is an apocalyptic number.

It is an amenable number.

129563893 is a deficient number, since it is larger than the sum of its proper divisors (52055).

129563893 is an equidigital number, since it uses as much as digits as its factorization.

129563893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52054.

The product of its digits is 349920, while the sum is 46.

The square root of 129563893 is about 11382.6136278097. The cubic root of 129563893 is about 506.0125981751.

The spelling of 129563893 in words is "one hundred twenty-nine million, five hundred sixty-three thousand, eight hundred ninety-three".