138950541 has 12 divisors (see below), whose sum is σ = 200932732. Its totient is φ = 92529216.

The previous prime is 138950489. The next prime is 138950551. The reversal of 138950541 is 145059831.

It can be written as a sum of positive squares in 2 ways, for example, as 23474025 + 115476516 = 4845^2 + 10746^2 .

It is not a de Polignac number, because 138950541 - 2¹¹ = 138948493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138950496 and 138950505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138950551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195 + ... + 16671.

Almost surely, 2^138950541 is an apocalyptic number.

It is an amenable number.

138950541 is a deficient number, since it is larger than the sum of its proper divisors (61982191).

138950541 is a wasteful number, since it uses less digits than its factorization.

138950541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17420 (or 17417 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 138950541 is about 11787.7284071190. The cubic root of 138950541 is about 517.9486999678.

The spelling of 138950541 in words is "one hundred thirty-eight million, nine hundred fifty thousand, five hundred forty-one".