138803643 has 48 divisors (see below), whose sum is σ = 233266176. Its totient is φ = 78693120.

The previous prime is 138803641. The next prime is 138803653. The reversal of 138803643 is 346308831.

It is a happy number.

138803643 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 0 + 3 + 643 = 666.

It is not a de Polignac number, because 138803643 - 2¹ = 138803641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138803598 and 138803607.

It is not an unprimeable number, because it can be changed into a prime (138803641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106371 + ... + 107667.

It is an arithmetic number, because the mean of its divisors is an integer number (4859712).

Almost surely, 2^138803643 is an apocalyptic number.

138803643 is a deficient number, since it is larger than the sum of its proper divisors (94462533).

138803643 is a wasteful number, since it uses less digits than its factorization.

138803643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 138803643 is about 11781.4957878870. The cubic root of 138803643 is about 517.7661111228.

The spelling of 138803643 in words is "one hundred thirty-eight million, eight hundred three thousand, six hundred forty-three".