138195043 has 16 divisors (see below), whose sum is σ = 161668800. Its totient is φ = 118079808.

The previous prime is 138195019. The next prime is 138195047. The reversal of 138195043 is 340591831.

It is not a de Polignac number, because 138195043 - 2⁹ = 138194531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138195047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211305 + ... + 211957.

It is an arithmetic number, because the mean of its divisors is an integer number (10104300).

Almost surely, 2^138195043 is an apocalyptic number.

138195043 is a deficient number, since it is larger than the sum of its proper divisors (23473757).

138195043 is an frugal number, since it uses more digits than its factorization.

138195043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 138195043 is about 11755.6387746477. The cubic root of 138195043 is about 517.0082680719.

The spelling of 138195043 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, forty-three".