138368725 has 12 divisors (see below), whose sum is σ = 187175520. Its totient is φ = 100631600.

The previous prime is 138368723. The next prime is 138368753. The reversal of 138368725 is 527863831.

It is not a de Polignac number, because 138368725 - 2¹ = 138368723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138368723) 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, 251305 + ... + 251854.

It is an arithmetic number, because the mean of its divisors is an integer number (15597960).

Almost surely, 2^138368725 is an apocalyptic number.

It is an amenable number.

138368725 is a deficient number, since it is larger than the sum of its proper divisors (48806795).

138368725 is a wasteful number, since it uses less digits than its factorization.

138368725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503180 (or 503175 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 138368725 is about 11763.0236334031. The cubic root of 138368725 is about 517.2247674882.

It can be divided in two parts, 138 and 368725, that added together give a palindrome (368863).

The spelling of 138368725 in words is "one hundred thirty-eight million, three hundred sixty-eight thousand, seven hundred twenty-five".