139605739 has 16 divisors (see below), whose sum is σ = 177750720. Its totient is φ = 106646400.

The previous prime is 139605733. The next prime is 139605743. The reversal of 139605739 is 937506931.

It is a happy number.

139605739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139605739 - 2⁵ = 139605707 is a prime.

It is a super-3 number, since 3×139605739³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 139605695 and 139605704.

It is not an unprimeable number, because it can be changed into a prime (139605733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23812 + ... + 29089.

It is an arithmetic number, because the mean of its divisors is an integer number (11109420).

Almost surely, 2^139605739 is an apocalyptic number.

139605739 is a deficient number, since it is larger than the sum of its proper divisors (38144981).

139605739 is a wasteful number, since it uses less digits than its factorization.

139605739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52950.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 139605739 is about 11815.4872519080. The cubic root of 139605739 is about 518.7615238355.

The spelling of 139605739 in words is "one hundred thirty-nine million, six hundred five thousand, seven hundred thirty-nine".