138071739 has 16 divisors (see below), whose sum is σ = 209920032. Its totient is φ = 79968768.

The previous prime is 138071719. The next prime is 138071761. The reversal of 138071739 is 937170831.

It is a happy number.

It is not a de Polignac number, because 138071739 - 2⁵ = 138071707 is a prime.

It is a super-5 number, since 5×138071739⁵ (a number of 42 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 138071697 and 138071706.

It is not an unprimeable number, because it can be changed into a prime (138071719) 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, 103464 + ... + 104789.

It is an arithmetic number, because the mean of its divisors is an integer number (13120002).

Almost surely, 2^138071739 is an apocalyptic number.

138071739 is a deficient number, since it is larger than the sum of its proper divisors (71848293).

138071739 is a wasteful number, since it uses less digits than its factorization.

138071739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208286.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 138071739 is about 11750.3931423591. The cubic root of 138071739 is about 516.8544560983.

The spelling of 138071739 in words is "one hundred thirty-eight million, seventy-one thousand, seven hundred thirty-nine".