138651841 has 8 divisors (see below), whose sum is σ = 142008768. Its totient is φ = 135330000.

The previous prime is 138651817. The next prime is 138651859. The reversal of 138651841 is 148156831.

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 138651841 - 2⁷ = 138651713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138651841.

It is not an unprimeable number, because it can be changed into a prime (138651041) 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, 685 + ... + 16666.

It is an arithmetic number, because the mean of its divisors is an integer number (17751096).

Almost surely, 2^138651841 is an apocalyptic number.

It is an amenable number.

138651841 is a deficient number, since it is larger than the sum of its proper divisors (3356927).

138651841 is a wasteful number, since it uses less digits than its factorization.

138651841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17543.

The product of its digits is 23040, while the sum is 37.

The square root of 138651841 is about 11775.0516347063. The cubic root of 138651841 is about 517.5772913875.

The spelling of 138651841 in words is "one hundred thirty-eight million, six hundred fifty-one thousand, eight hundred forty-one".