138850237 has 8 divisors (see below), whose sum is σ = 147135096. Its totient is φ = 130578432.

The previous prime is 138850211. The next prime is 138850247. The reversal of 138850237 is 732058831.

It can be written as a sum of positive squares in 4 ways, for example, as 93973636 + 44876601 = 9694^2 + 6699^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138850237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138850196 and 138850205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138850207) 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, 26443 + ... + 31255.

It is an arithmetic number, because the mean of its divisors is an integer number (18391887).

Almost surely, 2^138850237 is an apocalyptic number.

138850237 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138850237 is a deficient number, since it is larger than the sum of its proper divisors (8284859).

138850237 is a wasteful number, since it uses less digits than its factorization.

138850237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6527.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 138850237 is about 11783.4730449049. The cubic root of 138850237 is about 517.8240397063.

The spelling of 138850237 in words is "one hundred thirty-eight million, eight hundred fifty thousand, two hundred thirty-seven".