139069968 has 80 divisors (see below), whose sum is σ = 390451200. Its totient is φ = 42491520.

The previous prime is 139069963. The next prime is 139070023. The reversal of 139069968 is 869960931.

It is a self number, because there is not a number n which added to its sum of digits gives 139069968.

It is not an unprimeable number, because it can be changed into a prime (139069963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25813 + ... + 30731.

It is an arithmetic number, because the mean of its divisors is an integer number (4880640).

Almost surely, 2^139069968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139069968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195225600).

139069968 is an abundant number, since it is smaller than the sum of its proper divisors (251381232).

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

139069968 is a wasteful number, since it uses less digits than its factorization.

139069968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980 (or 4974 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 139069968 is about 11792.7930533865. The cubic root of 139069968 is about 518.0970485469.

The spelling of 139069968 in words is "one hundred thirty-nine million, sixty-nine thousand, nine hundred sixty-eight".