138731417 has 8 divisors (see below), whose sum is σ = 156225792. Its totient is φ = 122050800.

The previous prime is 138731393. The next prime is 138731431. The reversal of 138731417 is 714137831.

138731417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 138731417 - 2⁶ = 138731353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138731477) 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, 203078 + ... + 203759.

It is an arithmetic number, because the mean of its divisors is an integer number (19528224).

Almost surely, 2^138731417 is an apocalyptic number.

It is an amenable number.

138731417 is a deficient number, since it is larger than the sum of its proper divisors (17494375).

138731417 is a wasteful number, since it uses less digits than its factorization.

138731417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406879.

The product of its digits is 14112, while the sum is 35.

The square root of 138731417 is about 11778.4301585568. The cubic root of 138731417 is about 517.6762896010.

The spelling of 138731417 in words is "one hundred thirty-eight million, seven hundred thirty-one thousand, four hundred seventeen".