138765433 has 2 divisors, whose sum is σ = 138765434. Its totient is φ = 138765432.

The previous prime is 138765427. The next prime is 138765439. The reversal of 138765433 is 334567831.

It is a balanced prime because it is at equal distance from previous prime (138765427) and next prime (138765439).

It can be written as a sum of positive squares in only one way, i.e., 136726249 + 2039184 = 11693^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 138765433 - 2¹⁷ = 138634361 is a prime.

It is not a weakly prime, because it can be changed into another prime (138765439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69382716 + 69382717.

It is an arithmetic number, because the mean of its divisors is an integer number (69382717).

Almost surely, 2^138765433 is an apocalyptic number.

It is an amenable number.

138765433 is a deficient number, since it is larger than the sum of its proper divisors (1).

138765433 is an equidigital number, since it uses as much as digits as its factorization.

138765433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 138765433 is about 11779.8740655408. The cubic root of 138765433 is about 517.7185963787.

The spelling of 138765433 in words is "one hundred thirty-eight million, seven hundred sixty-five thousand, four hundred thirty-three".