139678329 has 32 divisors (see below), whose sum is σ = 225018880. Its totient is φ = 75287232.

The previous prime is 139678309. The next prime is 139678361. The reversal of 139678329 is 923876931.

It is not a de Polignac number, because 139678329 - 2¹² = 139674233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139678309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112299 + ... + 113535.

It is an arithmetic number, because the mean of its divisors is an integer number (7031840).

Almost surely, 2^139678329 is an apocalyptic number.

139678329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139678329 is a deficient number, since it is larger than the sum of its proper divisors (85340551).

139678329 is a wasteful number, since it uses less digits than its factorization.

139678329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549.

The product of its digits is 489888, while the sum is 48.

The square root of 139678329 is about 11818.5586684671. The cubic root of 139678329 is about 518.8514207467.

The spelling of 139678329 in words is "one hundred thirty-nine million, six hundred seventy-eight thousand, three hundred twenty-nine".