139751968 has 48 divisors (see below), whose sum is σ = 300754944. Its totient is φ = 63636480.

The previous prime is 139751947. The next prime is 139751977. The reversal of 139751968 is 869157931.

It is a super-3 number, since 3×139751968³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12721 + ... + 21007.

It is an arithmetic number, because the mean of its divisors is an integer number (6265728).

Almost surely, 2^139751968 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 139751968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150377472).

139751968 is an abundant number, since it is smaller than the sum of its proper divisors (161002976).

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

139751968 is a wasteful number, since it uses less digits than its factorization.

139751968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8345 (or 8337 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The square root of 139751968 is about 11821.6736547749. The cubic root of 139751968 is about 518.9425849418.

The spelling of 139751968 in words is "one hundred thirty-nine million, seven hundred fifty-one thousand, nine hundred sixty-eight".