138774943 has 2 divisors, whose sum is σ = 138774944. Its totient is φ = 138774942.

The previous prime is 138774871. The next prime is 138774983. The reversal of 138774943 is 349477831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138774943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138774893 and 138774902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138774983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69387471 + 69387472.

It is an arithmetic number, because the mean of its divisors is an integer number (69387472).

Almost surely, 2^138774943 is an apocalyptic number.

138774943 is a deficient number, since it is larger than the sum of its proper divisors (1).

138774943 is an equidigital number, since it uses as much as digits as its factorization.

138774943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 138774943 is about 11780.2777131951. The cubic root of 138774943 is about 517.7304230305.

The spelling of 138774943 in words is "one hundred thirty-eight million, seven hundred seventy-four thousand, nine hundred forty-three".