139996726 has 4 divisors (see below), whose sum is σ = 209995092. Its totient is φ = 69998362.

The previous prime is 139996721. The next prime is 139996739. The reversal of 139996726 is 627699931.

139996726 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 627699931 = 37 ⋅16964863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139996721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34999180 + ... + 34999183.

It is an arithmetic number, because the mean of its divisors is an integer number (52498773).

Almost surely, 2^139996726 is an apocalyptic number.

139996726 is a deficient number, since it is larger than the sum of its proper divisors (69998366).

139996726 is an equidigital number, since it uses as much as digits as its factorization.

139996726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69998365.

The product of its digits is 1102248, while the sum is 52.

The square root of 139996726 is about 11832.0212136389. The cubic root of 139996726 is about 519.2453624808.

The spelling of 139996726 in words is "one hundred thirty-nine million, nine hundred ninety-six thousand, seven hundred twenty-six".