138434937 has 8 divisors (see below), whose sum is σ = 187108704. Its totient is φ = 91025568.

The previous prime is 138434929. The next prime is 138434957. The reversal of 138434937 is 739434831.

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

It is not a de Polignac number, because 138434937 - 2³ = 138434929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138434957) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 315843 + ... + 316280.

It is an arithmetic number, because the mean of its divisors is an integer number (23388588).

Almost surely, 2^138434937 is an apocalyptic number.

It is an amenable number.

138434937 is a deficient number, since it is larger than the sum of its proper divisors (48673767).

138434937 is an equidigital number, since it uses as much as digits as its factorization.

138434937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632199.

The product of its digits is 217728, while the sum is 42.

The square root of 138434937 is about 11765.8377092326. The cubic root of 138434937 is about 517.3072548789.

The spelling of 138434937 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, nine hundred thirty-seven".