138001623 has 8 divisors (see below), whose sum is σ = 184702848. Its totient is φ = 91650744.

The previous prime is 138001621. The next prime is 138001637. The reversal of 138001623 is 326100831.

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

It is not a de Polignac number, because 138001623 - 2¹ = 138001621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138001593 and 138001602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138001621) 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, 86665 + ... + 88242.

It is an arithmetic number, because the mean of its divisors is an integer number (23087856).

Almost surely, 2^138001623 is an apocalyptic number.

138001623 is a deficient number, since it is larger than the sum of its proper divisors (46701225).

138001623 is a wasteful number, since it uses less digits than its factorization.

138001623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175173.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 138001623 is about 11747.4092037351. The cubic root of 138001623 is about 516.7669510967.

The spelling of 138001623 in words is "one hundred thirty-eight million, one thousand, six hundred twenty-three".