138383837 has 12 divisors (see below), whose sum is σ = 142710036. Its totient is φ = 134150400.

The previous prime is 138383831. The next prime is 138383863. The reversal of 138383837 is 738383831.

It can be written as a sum of positive squares in 6 ways, for example, as 22477081 + 115906756 = 4741^2 + 10766^2 .

It is not a de Polignac number, because 138383837 - 2¹⁰ = 138382813 is a prime.

Its product of digits (290304) is a multiple of the sum of its prime factors (448).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138383831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010033 + ... + 1010169.

It is an arithmetic number, because the mean of its divisors is an integer number (11892503).

Almost surely, 2^138383837 is an apocalyptic number.

It is an amenable number.

138383837 is a deficient number, since it is larger than the sum of its proper divisors (4326199).

138383837 is an equidigital number, since it uses as much as digits as its factorization.

138383837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 311 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 138383837 is about 11763.6659677160. The cubic root of 138383837 is about 517.2435964448.

The spelling of 138383837 in words is "one hundred thirty-eight million, three hundred eighty-three thousand, eight hundred thirty-seven".