138970633 has 2 divisors, whose sum is σ = 138970634. Its totient is φ = 138970632.

The previous prime is 138970619. The next prime is 138970649. The reversal of 138970633 is 336079831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138956944 + 13689 = 11788^2 + 117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138970633 is a prime.

It is not a weakly prime, because it can be changed into another prime (138970603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69485316 + 69485317.

It is an arithmetic number, because the mean of its divisors is an integer number (69485317).

Almost surely, 2^138970633 is an apocalyptic number.

It is an amenable number.

138970633 is a deficient number, since it is larger than the sum of its proper divisors (1).

138970633 is an equidigital number, since it uses as much as digits as its factorization.

138970633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 138970633 is about 11788.5806185478. The cubic root of 138970633 is about 517.9736635835.

The spelling of 138970633 in words is "one hundred thirty-eight million, nine hundred seventy thousand, six hundred thirty-three".