129866797 has 4 divisors (see below), whose sum is σ = 129902620. Its totient is φ = 129830976.

The previous prime is 129866773. The next prime is 129866813. The reversal of 129866797 is 797668921.

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 94595076 + 35271721 = 9726^2 + 5939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129866797 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129866747) 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, 11772 + ... + 19957.

It is an arithmetic number, because the mean of its divisors is an integer number (32475655).

Almost surely, 2^129866797 is an apocalyptic number.

It is an amenable number.

129866797 is a deficient number, since it is larger than the sum of its proper divisors (35823).

129866797 is an equidigital number, since it uses as much as digits as its factorization.

129866797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35822.

The product of its digits is 2286144, while the sum is 55.

The square root of 129866797 is about 11395.9114159421. The cubic root of 129866797 is about 506.4066224332.

The spelling of 129866797 in words is "one hundred twenty-nine million, eight hundred sixty-six thousand, seven hundred ninety-seven".