139690712 has 64 divisors (see below), whose sum is σ = 313866240. Its totient is φ = 57024000.

The previous prime is 139690711. The next prime is 139690739. The reversal of 139690712 is 217096931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139690711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115712 + ... + 116912.

It is an arithmetic number, because the mean of its divisors is an integer number (4904160).

Almost surely, 2^139690712 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 139690712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156933120).

139690712 is an abundant number, since it is smaller than the sum of its proper divisors (174175528).

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

139690712 is a wasteful number, since it uses less digits than its factorization.

139690712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 139690712 is about 11819.0825363054. The cubic root of 139690712 is about 518.8667529922.

The spelling of 139690712 in words is "one hundred thirty-nine million, six hundred ninety thousand, seven hundred twelve".