138776941 has 2 divisors, whose sum is σ = 138776942. Its totient is φ = 138776940.

The previous prime is 138776927. The next prime is 138776993. The reversal of 138776941 is 149677831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103612041 + 35164900 = 10179^2 + 5930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138776941 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 138776891 and 138776900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138776921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69388470 + 69388471.

It is an arithmetic number, because the mean of its divisors is an integer number (69388471).

Almost surely, 2^138776941 is an apocalyptic number.

It is an amenable number.

138776941 is a deficient number, since it is larger than the sum of its proper divisors (1).

138776941 is an equidigital number, since it uses as much as digits as its factorization.

138776941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 138776941 is about 11780.3625156444. The cubic root of 138776941 is about 517.7329076779.

The spelling of 138776941 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, nine hundred forty-one".