129223843386 has 16 divisors (see below), whose sum is σ = 281942931168. Its totient is φ = 39158740400.

The previous prime is 129223843381. The next prime is 129223843391. The reversal of 129223843386 is 683348322921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129223843381) and next prime (129223843391).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129223843381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978968445 + ... + 978968576.

It is an arithmetic number, because the mean of its divisors is an integer number (17621433198).

Almost surely, 2^129223843386 is an apocalyptic number.

129223843386 is an abundant number, since it is smaller than the sum of its proper divisors (152719087782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129223843386 is a wasteful number, since it uses less digits than its factorization.

129223843386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957937037.

The product of its digits is 2985984, while the sum is 51.

The spelling of 129223843386 in words is "one hundred twenty-nine billion, two hundred twenty-three million, eight hundred forty-three thousand, three hundred eighty-six".