138683747 has 2 divisors, whose sum is σ = 138683748. Its totient is φ = 138683746.

The previous prime is 138683731. The next prime is 138683761. The reversal of 138683747 is 747386831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138683747 - 2⁴ = 138683731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138683047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69341873 + 69341874.

It is an arithmetic number, because the mean of its divisors is an integer number (69341874).

Almost surely, 2^138683747 is an apocalyptic number.

138683747 is a deficient number, since it is larger than the sum of its proper divisors (1).

138683747 is an equidigital number, since it uses as much as digits as its factorization.

138683747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 138683747 is about 11776.4063703661. The cubic root of 138683747 is about 517.6169892726.

The spelling of 138683747 in words is "one hundred thirty-eight million, six hundred eighty-three thousand, seven hundred forty-seven".