129823193 has 2 divisors, whose sum is σ = 129823194. Its totient is φ = 129823192.

The previous prime is 129823171. The next prime is 129823217. The reversal of 129823193 is 391328921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128414224 + 1408969 = 11332^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 129823193 - 2¹⁶ = 129757657 is a prime.

It is a super-2 number, since 2×129823193² = 33708122881430498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129823103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64911596 + 64911597.

It is an arithmetic number, because the mean of its divisors is an integer number (64911597).

Almost surely, 2^129823193 is an apocalyptic number.

It is an amenable number.

129823193 is a deficient number, since it is larger than the sum of its proper divisors (1).

129823193 is an equidigital number, since it uses as much as digits as its factorization.

129823193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 129823193 is about 11393.9981130418. The cubic root of 129823193 is about 506.3499391580.

The spelling of 129823193 in words is "one hundred twenty-nine million, eight hundred twenty-three thousand, one hundred ninety-three".