138683843 has 2 divisors, whose sum is σ = 138683844. Its totient is φ = 138683842.

The previous prime is 138683821. The next prime is 138683891. The reversal of 138683843 is 348386831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138683843 - 2²⁴ = 121906627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138683794 and 138683803.

It is not a weakly prime, because it can be changed into another prime (138683143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69341921 + 69341922.

It is an arithmetic number, because the mean of its divisors is an integer number (69341922).

Almost surely, 2^138683843 is an apocalyptic number.

138683843 is a deficient number, since it is larger than the sum of its proper divisors (1).

138683843 is an equidigital number, since it uses as much as digits as its factorization.

138683843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 138683843 is about 11776.4104463117. The cubic root of 138683843 is about 517.6171087079.

The spelling of 138683843 in words is "one hundred thirty-eight million, six hundred eighty-three thousand, eight hundred forty-three".