138356411 has 2 divisors, whose sum is σ = 138356412. Its totient is φ = 138356410.

The previous prime is 138356381. The next prime is 138356443. The reversal of 138356411 is 114653831.

It is an a-pointer prime, because the next prime (138356443) can be obtained adding 138356411 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138356411 - 2¹⁸ = 138094267 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (138356011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69178205 + 69178206.

It is an arithmetic number, because the mean of its divisors is an integer number (69178206).

Almost surely, 2^138356411 is an apocalyptic number.

138356411 is a deficient number, since it is larger than the sum of its proper divisors (1).

138356411 is an equidigital number, since it uses as much as digits as its factorization.

138356411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 138356411 is about 11762.5002019129. The cubic root of 138356411 is about 517.2094237157.

The spelling of 138356411 in words is "one hundred thirty-eight million, three hundred fifty-six thousand, four hundred eleven".