129067997 has 2 divisors, whose sum is σ = 129067998. Its totient is φ = 129067996.

The previous prime is 129067979. The next prime is 129068003. The reversal of 129067997 is 799760921.

Together with previous prime (129067979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72352036 + 56715961 = 8506^2 + 7531^2 .

It is an emirp because it is prime and its reverse (799760921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129067997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129067907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64533998 + 64533999.

It is an arithmetic number, because the mean of its divisors is an integer number (64533999).

Almost surely, 2^129067997 is an apocalyptic number.

It is an amenable number.

129067997 is a deficient number, since it is larger than the sum of its proper divisors (1).

129067997 is an equidigital number, since it uses as much as digits as its factorization.

129067997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 129067997 is about 11360.8096982565. The cubic root of 129067997 is about 505.3661978082.

The spelling of 129067997 in words is "one hundred twenty-nine million, sixty-seven thousand, nine hundred ninety-seven".