138835947 has 8 divisors (see below), whose sum is σ = 186055056. Its totient is φ = 92087072.

The previous prime is 138835927. The next prime is 138835967. The reversal of 138835947 is 749538831.

It is an interprime number because it is at equal distance from previous prime (138835927) and next prime (138835967).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138835947 - 2⁶ = 138835883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138835896 and 138835905.

It is not an unprimeable number, because it can be changed into a prime (138835927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116868 + ... + 118049.

It is an arithmetic number, because the mean of its divisors is an integer number (23256882).

Almost surely, 2^138835947 is an apocalyptic number.

138835947 is a deficient number, since it is larger than the sum of its proper divisors (47219109).

138835947 is a wasteful number, since it uses less digits than its factorization.

138835947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235117.

The product of its digits is 725760, while the sum is 48.

The square root of 138835947 is about 11782.8666715702. The cubic root of 138835947 is about 517.8062748599.

The spelling of 138835947 in words is "one hundred thirty-eight million, eight hundred thirty-five thousand, nine hundred forty-seven".