139438522 has 8 divisors (see below), whose sum is σ = 221461236. Its totient is φ = 65618112.

The previous prime is 139438517. The next prime is 139438529. The reversal of 139438522 is 225834931.

It can be written as a sum of positive squares in 2 ways, for example, as 137100681 + 2337841 = 11709^2 + 1529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×139438522³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (139438529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050533 + ... + 2050600.

Almost surely, 2^139438522 is an apocalyptic number.

139438522 is a deficient number, since it is larger than the sum of its proper divisors (82022714).

139438522 is a wasteful number, since it uses less digits than its factorization.

139438522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101152.

The product of its digits is 51840, while the sum is 37.

The square root of 139438522 is about 11808.4089529454. The cubic root of 139438522 is about 518.5543203124.

The spelling of 139438522 in words is "one hundred thirty-nine million, four hundred thirty-eight thousand, five hundred twenty-two".