129228293 has 2 divisors, whose sum is σ = 129228294. Its totient is φ = 129228292.

The previous prime is 129228259. The next prime is 129228301. The reversal of 129228293 is 392822921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110712484 + 18515809 = 10522^2 + 4303^2 .

It is an emirp because it is prime and its reverse (392822921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129228293 - 2¹⁶ = 129162757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129228233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64614146 + 64614147.

It is an arithmetic number, because the mean of its divisors is an integer number (64614147).

Almost surely, 2^129228293 is an apocalyptic number.

It is an amenable number.

129228293 is a deficient number, since it is larger than the sum of its proper divisors (1).

129228293 is an equidigital number, since it uses as much as digits as its factorization.

129228293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 129228293 is about 11367.8622880469. The cubic root of 129228293 is about 505.5753244418.

The spelling of 129228293 in words is "one hundred twenty-nine million, two hundred twenty-eight thousand, two hundred ninety-three".