138053959 has 2 divisors, whose sum is σ = 138053960. Its totient is φ = 138053958.

The previous prime is 138053933. The next prime is 138053987. The reversal of 138053959 is 959350831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138053959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138053999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69026979 + 69026980.

It is an arithmetic number, because the mean of its divisors is an integer number (69026980).

Almost surely, 2^138053959 is an apocalyptic number.

138053959 is a deficient number, since it is larger than the sum of its proper divisors (1).

138053959 is an equidigital number, since it uses as much as digits as its factorization.

138053959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 138053959 is about 11749.6365475703. The cubic root of 138053959 is about 516.8322694033.

The spelling of 138053959 in words is "one hundred thirty-eight million, fifty-three thousand, nine hundred fifty-nine".