138737659 has 2 divisors, whose sum is σ = 138737660. Its totient is φ = 138737658.

The previous prime is 138737647. The next prime is 138737693. The reversal of 138737659 is 956737831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138737659 - 2⁹ = 138737147 is a prime.

It is not a weakly prime, because it can be changed into another prime (138737699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69368829 + 69368830.

It is an arithmetic number, because the mean of its divisors is an integer number (69368830).

Almost surely, 2^138737659 is an apocalyptic number.

138737659 is a deficient number, since it is larger than the sum of its proper divisors (1).

138737659 is an equidigital number, since it uses as much as digits as its factorization.

138737659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 138737659 is about 11778.6951314651. The cubic root of 138737659 is about 517.6840534924.

The spelling of 138737659 in words is "one hundred thirty-eight million, seven hundred thirty-seven thousand, six hundred fifty-nine".