138145783 has 2 divisors, whose sum is σ = 138145784. Its totient is φ = 138145782.

The previous prime is 138145771. The next prime is 138145793. The reversal of 138145783 is 387541831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138145783 - 2¹³ = 138137591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138145793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69072891 + 69072892.

It is an arithmetic number, because the mean of its divisors is an integer number (69072892).

Almost surely, 2^138145783 is an apocalyptic number.

138145783 is a deficient number, since it is larger than the sum of its proper divisors (1).

138145783 is an equidigital number, since it uses as much as digits as its factorization.

138145783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 138145783 is about 11753.5434231554. The cubic root of 138145783 is about 516.9468311024.

The spelling of 138145783 in words is "one hundred thirty-eight million, one hundred forty-five thousand, seven hundred eighty-three".