138161774 has 8 divisors (see below), whose sum is σ = 212843928. Its totient is φ = 67213800.

The previous prime is 138161773. The next prime is 138161789. The reversal of 138161774 is 477161831.

It is a happy number.

138161774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×138161774³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138161773) 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, 933452 + ... + 933599.

It is an arithmetic number, because the mean of its divisors is an integer number (26605491).

Almost surely, 2^138161774 is an apocalyptic number.

138161774 is a deficient number, since it is larger than the sum of its proper divisors (74682154).

138161774 is a wasteful number, since it uses less digits than its factorization.

138161774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867090.

The product of its digits is 28224, while the sum is 38.

The square root of 138161774 is about 11754.2236664103. The cubic root of 138161774 is about 516.9667766451.

The spelling of 138161774 in words is "one hundred thirty-eight million, one hundred sixty-one thousand, seven hundred seventy-four".