129258397 has 2 divisors, whose sum is σ = 129258398. Its totient is φ = 129258396.

The previous prime is 129258391. The next prime is 129258403. The reversal of 129258397 is 793852921.

It is a balanced prime because it is at equal distance from previous prime (129258391) and next prime (129258403).

It can be written as a sum of positive squares in only one way, i.e., 126990361 + 2268036 = 11269^2 + 1506^2 .

It is a cyclic number.

It is not a de Polignac number, because 129258397 - 2²³ = 120869789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129258391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64629198 + 64629199.

It is an arithmetic number, because the mean of its divisors is an integer number (64629199).

Almost surely, 2^129258397 is an apocalyptic number.

It is an amenable number.

129258397 is a deficient number, since it is larger than the sum of its proper divisors (1).

129258397 is an equidigital number, since it uses as much as digits as its factorization.

129258397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 129258397 is about 11369.1862945419. The cubic root of 129258397 is about 505.6145796686.

The spelling of 129258397 in words is "one hundred twenty-nine million, two hundred fifty-eight thousand, three hundred ninety-seven".