138117026 has 8 divisors (see below), whose sum is σ = 209187264. Its totient is φ = 68387940.

The previous prime is 138116981. The next prime is 138117071. The reversal of 138117026 is 620711831.

138117026 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138116981) and next prime (138117071).

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

It is a self number, because there is not a number n which added to its sum of digits gives 138117026.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335030 + ... + 335441.

It is an arithmetic number, because the mean of its divisors is an integer number (26148408).

Almost surely, 2^138117026 is an apocalyptic number.

138117026 is a deficient number, since it is larger than the sum of its proper divisors (71070238).

138117026 is a wasteful number, since it uses less digits than its factorization.

138117026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670576.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 138117026 is about 11752.3200262757. The cubic root of 138117026 is about 516.9109586800.

Adding to 138117026 its reverse (620711831), we get a palindrome (758828857).

The spelling of 138117026 in words is "one hundred thirty-eight million, one hundred seventeen thousand, twenty-six".