138957007 has 8 divisors (see below), whose sum is σ = 165712896. Its totient is φ = 113927352.

The previous prime is 138957001. The next prime is 138957017. The reversal of 138957007 is 700759831.

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

It is not a de Polignac number, because 138957007 - 2³ = 138956999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138957001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431383 + ... + 431704.

It is an arithmetic number, because the mean of its divisors is an integer number (20714112).

Almost surely, 2^138957007 is an apocalyptic number.

138957007 is a deficient number, since it is larger than the sum of its proper divisors (26755889).

138957007 is an equidigital number, since it uses as much as digits as its factorization.

138957007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863117.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 138957007 is about 11788.0026722087. The cubic root of 138957007 is about 517.9567340120.

It can be divided in two parts, 13895 and 7007, that added together give a palindrome (20902).

The spelling of 138957007 in words is "one hundred thirty-eight million, nine hundred fifty-seven thousand, seven".