138947434 has 8 divisors (see below), whose sum is σ = 208559520. Its totient is φ = 69427596.

The previous prime is 138947411. The next prime is 138947441. The reversal of 138947434 is 434749831.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19164 + ... + 25399.

It is an arithmetic number, because the mean of its divisors is an integer number (26069940).

Almost surely, 2^138947434 is an apocalyptic number.

138947434 is a deficient number, since it is larger than the sum of its proper divisors (69612086).

138947434 is a wasteful number, since it uses less digits than its factorization.

138947434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46124.

The product of its digits is 290304, while the sum is 43.

The square root of 138947434 is about 11787.5966167833. The cubic root of 138947434 is about 517.9448394128.

The spelling of 138947434 in words is "one hundred thirty-eight million, nine hundred forty-seven thousand, four hundred thirty-four".