138968234 has 8 divisors (see below), whose sum is σ = 220714308. Its totient is φ = 65396800.

The previous prime is 138968233. The next prime is 138968281. The reversal of 138968234 is 432869831.

138968234 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 128709025 + 10259209 = 11345^2 + 3203^2 .

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

It is a super-2 number, since 2×138968234² = 38624340122157512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138968233) 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, 2043617 + ... + 2043684.

Almost surely, 2^138968234 is an apocalyptic number.

138968234 is a deficient number, since it is larger than the sum of its proper divisors (81746074).

138968234 is a wasteful number, since it uses less digits than its factorization.

138968234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087320.

The product of its digits is 248832, while the sum is 44.

The square root of 138968234 is about 11788.4788670973. The cubic root of 138968234 is about 517.9706830354.

The spelling of 138968234 in words is "one hundred thirty-eight million, nine hundred sixty-eight thousand, two hundred thirty-four".