139708465 has 16 divisors (see below), whose sum is σ = 191168208. Its totient is φ = 97099776.

The previous prime is 139708391. The next prime is 139708469. The reversal of 139708465 is 564807931.

It can be written as a sum of positive squares in 8 ways, for example, as 633616 + 139074849 = 796^2 + 11793^2 .

It is a cyclic number.

It is not a de Polignac number, because 139708465 - 2¹¹ = 139706417 is a prime.

It is a super-3 number, since 3×139708465³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139708469) 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, 62112 + ... + 64321.

It is an arithmetic number, because the mean of its divisors is an integer number (11948013).

Almost surely, 2^139708465 is an apocalyptic number.

It is an amenable number.

139708465 is a deficient number, since it is larger than the sum of its proper divisors (51459743).

139708465 is a wasteful number, since it uses less digits than its factorization.

139708465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126468.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 139708465 is about 11819.8335436672. The cubic root of 139708465 is about 518.8887326241. Note that the first 3 decimals are identical.

The spelling of 139708465 in words is "one hundred thirty-nine million, seven hundred eight thousand, four hundred sixty-five".