139811329 has 24 divisors (see below), whose sum is σ = 171590208. Its totient is φ = 111546720.

The previous prime is 139811311. The next prime is 139811387. The reversal of 139811329 is 923118931.

It is not a de Polignac number, because 139811329 - 2¹¹ = 139809281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139811029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153694 + ... + 154600.

It is an arithmetic number, because the mean of its divisors is an integer number (7149592).

Almost surely, 2^139811329 is an apocalyptic number.

139811329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139811329 is a deficient number, since it is larger than the sum of its proper divisors (31778879).

139811329 is an equidigital number, since it uses as much as digits as its factorization.

139811329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013 (or 994 counting only the distinct ones).

The product of its digits is 11664, while the sum is 37.

The square root of 139811329 is about 11824.1840733304. The cubic root of 139811329 is about 519.0160498351.

The spelling of 139811329 in words is "one hundred thirty-nine million, eight hundred eleven thousand, three hundred twenty-nine".