138696619 has 2 divisors, whose sum is σ = 138696620. Its totient is φ = 138696618.

The previous prime is 138696611. The next prime is 138696641. The reversal of 138696619 is 916696831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138696619 - 2³ = 138696611 is a prime.

It is a super-2 number, since 2×138696619² = 38473504244062322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138696611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69348309 + 69348310.

It is an arithmetic number, because the mean of its divisors is an integer number (69348310).

Almost surely, 2^138696619 is an apocalyptic number.

138696619 is a deficient number, since it is larger than the sum of its proper divisors (1).

138696619 is an equidigital number, since it uses as much as digits as its factorization.

138696619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 138696619 is about 11776.9528741521. The cubic root of 138696619 is about 517.6330030687.

The spelling of 138696619 in words is "one hundred thirty-eight million, six hundred ninety-six thousand, six hundred nineteen".