138783237 has 16 divisors (see below), whose sum is σ = 190391040. Its totient is φ = 89868800.

The previous prime is 138783157. The next prime is 138783247. The reversal of 138783237 is 732387831.

It is a cyclic number.

It is not a de Polignac number, because 138783237 - 2⁷ = 138783109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138783247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27037 + ... + 31757.

It is an arithmetic number, because the mean of its divisors is an integer number (11899440).

Almost surely, 2^138783237 is an apocalyptic number.

It is an amenable number.

138783237 is a deficient number, since it is larger than the sum of its proper divisors (51607803).

138783237 is a wasteful number, since it uses less digits than its factorization.

138783237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004.

The product of its digits is 169344, while the sum is 42.

The square root of 138783237 is about 11780.6297369877. The cubic root of 138783237 is about 517.7407370216.

The spelling of 138783237 in words is "one hundred thirty-eight million, seven hundred eighty-three thousand, two hundred thirty-seven".