138023137 has 8 divisors (see below), whose sum is σ = 157927616. Its totient is φ = 118165392.

The previous prime is 138023117. The next prime is 138023159. The reversal of 138023137 is 731320831.

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-138023137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138023117) 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, 5103 + ... + 17380.

It is an arithmetic number, because the mean of its divisors is an integer number (19740952).

Almost surely, 2^138023137 is an apocalyptic number.

It is an amenable number.

138023137 is a deficient number, since it is larger than the sum of its proper divisors (19904479).

138023137 is an equidigital number, since it uses as much as digits as its factorization.

138023137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23367.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 138023137 is about 11748.3248593151. The cubic root of 138023137 is about 516.7938037918.

Adding to 138023137 its reverse (731320831), we get a palindrome (869343968).

The spelling of 138023137 in words is "one hundred thirty-eight million, twenty-three thousand, one hundred thirty-seven".