138957097 has 8 divisors (see below), whose sum is σ = 143700480. Its totient is φ = 134230080.

The previous prime is 138957083. The next prime is 138957101. The reversal of 138957097 is 790759831.

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 138957097 - 2²³ = 130568489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138957097.

It is not an unprimeable number, because it can be changed into a prime (138957017) 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, 14604 + ... + 22162.

It is an arithmetic number, because the mean of its divisors is an integer number (17962560).

Almost surely, 2^138957097 is an apocalyptic number.

It is an amenable number.

138957097 is a deficient number, since it is larger than the sum of its proper divisors (4743383).

138957097 is an equidigital number, since it uses as much as digits as its factorization.

138957097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8183.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 138957097 is about 11788.0064896487. The cubic root of 138957097 is about 517.9568458357.

The spelling of 138957097 in words is "one hundred thirty-eight million, nine hundred fifty-seven thousand, ninety-seven".