129795823 has 2 divisors, whose sum is σ = 129795824. Its totient is φ = 129795822.

The previous prime is 129795803. The next prime is 129795839. The reversal of 129795823 is 328597921.

It is a strong prime.

It is an emirp because it is prime and its reverse (328597921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129795823 - 2¹⁷ = 129664751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129795803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64897911 + 64897912.

It is an arithmetic number, because the mean of its divisors is an integer number (64897912).

Almost surely, 2^129795823 is an apocalyptic number.

129795823 is a deficient number, since it is larger than the sum of its proper divisors (1).

129795823 is an equidigital number, since it uses as much as digits as its factorization.

129795823 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 129795823 is about 11392.7969787932. The cubic root of 129795823 is about 506.3143528822.

The spelling of 129795823 in words is "one hundred twenty-nine million, seven hundred ninety-five thousand, eight hundred twenty-three".