138696347 has 2 divisors, whose sum is σ = 138696348. Its totient is φ = 138696346.

The previous prime is 138696329. The next prime is 138696367. The reversal of 138696347 is 743696831.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (743696831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138696347 - 2²⁴ = 121919131 is a prime.

It is a super-2 number, since 2×138696347² = 38473353342288818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138696307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69348173 + 69348174.

It is an arithmetic number, because the mean of its divisors is an integer number (69348174).

Almost surely, 2^138696347 is an apocalyptic number.

138696347 is a deficient number, since it is larger than the sum of its proper divisors (1).

138696347 is an equidigital number, since it uses as much as digits as its factorization.

138696347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 138696347 is about 11776.9413261678. The cubic root of 138696347 is about 517.6326646892.

The spelling of 138696347 in words is "one hundred thirty-eight million, six hundred ninety-six thousand, three hundred forty-seven".