138003947 has 2 divisors, whose sum is σ = 138003948. Its totient is φ = 138003946.

The previous prime is 138003941. The next prime is 138003959. The reversal of 138003947 is 749300831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138003947 - 2²⁴ = 121226731 is a prime.

It is not a weakly prime, because it can be changed into another prime (138003941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69001973 + 69001974.

It is an arithmetic number, because the mean of its divisors is an integer number (69001974).

Almost surely, 2^138003947 is an apocalyptic number.

138003947 is a deficient number, since it is larger than the sum of its proper divisors (1).

138003947 is an equidigital number, since it uses as much as digits as its factorization.

138003947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 138003947 is about 11747.5081187459. The cubic root of 138003947 is about 516.7698519313.

The spelling of 138003947 in words is "one hundred thirty-eight million, three thousand, nine hundred forty-seven".