138880541 has 2 divisors, whose sum is σ = 138880542. Its totient is φ = 138880540.

The previous prime is 138880517. The next prime is 138880549. The reversal of 138880541 is 145088831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137968516 + 912025 = 11746^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 138880541 - 2⁶ = 138880477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138880495 and 138880504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138880549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69440270 + 69440271.

It is an arithmetic number, because the mean of its divisors is an integer number (69440271).

Almost surely, 2^138880541 is an apocalyptic number.

It is an amenable number.

138880541 is a deficient number, since it is larger than the sum of its proper divisors (1).

138880541 is an equidigital number, since it uses as much as digits as its factorization.

138880541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 138880541 is about 11784.7588435233. The cubic root of 138880541 is about 517.8617085851.

The spelling of 138880541 in words is "one hundred thirty-eight million, eight hundred eighty thousand, five hundred forty-one".