129850823 has 2 divisors, whose sum is σ = 129850824. Its totient is φ = 129850822.

The previous prime is 129850817. The next prime is 129850829. The reversal of 129850823 is 328058921.

It is a balanced prime because it is at equal distance from previous prime (129850817) and next prime (129850829).

It is a cyclic number.

It is not a de Polignac number, because 129850823 - 2⁶ = 129850759 is a prime.

It is a super-2 number, since 2×129850823² = 33722472467554658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129850829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64925411 + 64925412.

It is an arithmetic number, because the mean of its divisors is an integer number (64925412).

Almost surely, 2^129850823 is an apocalyptic number.

129850823 is a deficient number, since it is larger than the sum of its proper divisors (1).

129850823 is an equidigital number, since it uses as much as digits as its factorization.

129850823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 129850823 is about 11395.2105289898. The cubic root of 129850823 is about 506.3858584112.

The spelling of 129850823 in words is "one hundred twenty-nine million, eight hundred fifty thousand, eight hundred twenty-three".