138501433 has 8 divisors (see below), whose sum is σ = 161655552. Its totient is φ = 116189376.

The previous prime is 138501373. The next prime is 138501437. The reversal of 138501433 is 334105831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138501433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138501437) 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, 210160 + ... + 210817.

It is an arithmetic number, because the mean of its divisors is an integer number (20206944).

Almost surely, 2^138501433 is an apocalyptic number.

It is an amenable number.

138501433 is a deficient number, since it is larger than the sum of its proper divisors (23154119).

138501433 is an equidigital number, since it uses as much as digits as its factorization.

138501433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421031.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 138501433 is about 11768.6631781184. The cubic root of 138501433 is about 517.3900696117.

The spelling of 138501433 in words is "one hundred thirty-eight million, five hundred one thousand, four hundred thirty-three".