138359933 has 2 divisors, whose sum is σ = 138359934. Its totient is φ = 138359932.

The previous prime is 138359929. The next prime is 138359951. The reversal of 138359933 is 339953831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133702969 + 4656964 = 11563^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 138359933 - 2² = 138359929 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138359993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69179966 + 69179967.

It is an arithmetic number, because the mean of its divisors is an integer number (69179967).

Almost surely, 2^138359933 is an apocalyptic number.

It is an amenable number.

138359933 is a deficient number, since it is larger than the sum of its proper divisors (1).

138359933 is an equidigital number, since it uses as much as digits as its factorization.

138359933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 44.

The square root of 138359933 is about 11762.6499140287. The cubic root of 138359933 is about 517.2138123718.

It can be divided in two parts, 1383 and 59933, that added together give a palindrome (61316).

The spelling of 138359933 in words is "one hundred thirty-eight million, three hundred fifty-nine thousand, nine hundred thirty-three".