138565699 has 2 divisors, whose sum is σ = 138565700. Its totient is φ = 138565698.

The previous prime is 138565697. The next prime is 138565723. The reversal of 138565699 is 996565831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138565699 - 2¹ = 138565697 is a prime.

Together with 138565697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (138565697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69282849 + 69282850.

It is an arithmetic number, because the mean of its divisors is an integer number (69282850).

Almost surely, 2^138565699 is an apocalyptic number.

138565699 is a deficient number, since it is larger than the sum of its proper divisors (1).

138565699 is an equidigital number, since it uses as much as digits as its factorization.

138565699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 52.

The square root of 138565699 is about 11771.3932480399. The cubic root of 138565699 is about 517.4700818974.

The spelling of 138565699 in words is "one hundred thirty-eight million, five hundred sixty-five thousand, six hundred ninety-nine".