138690411 has 4 divisors (see below), whose sum is σ = 184920552. Its totient is φ = 92460272.

The previous prime is 138690407. The next prime is 138690421. The reversal of 138690411 is 114096831.

138690411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114096831 = 3 ⋅38032277.

It is a cyclic number.

It is not a de Polignac number, because 138690411 - 2² = 138690407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138690421) 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, 23115066 + ... + 23115071.

It is an arithmetic number, because the mean of its divisors is an integer number (46230138).

Almost surely, 2^138690411 is an apocalyptic number.

138690411 is a deficient number, since it is larger than the sum of its proper divisors (46230141).

138690411 is an equidigital number, since it uses as much as digits as its factorization.

138690411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46230140.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 138690411 is about 11776.6893055731. The cubic root of 138690411 is about 517.6252799445.

The spelling of 138690411 in words is "one hundred thirty-eight million, six hundred ninety thousand, four hundred eleven".