138797497 has 8 divisors (see below), whose sum is σ = 141261120. Its totient is φ = 136352880.

The previous prime is 138797467. The next prime is 138797531. The reversal of 138797497 is 794797831.

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 138797497 - 2¹⁵ = 138764729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138797437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10404 + ... + 19642.

It is an arithmetic number, because the mean of its divisors is an integer number (17657640).

Almost surely, 2^138797497 is an apocalyptic number.

It is an amenable number.

138797497 is a deficient number, since it is larger than the sum of its proper divisors (2463623).

138797497 is an equidigital number, since it uses as much as digits as its factorization.

138797497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503.

The product of its digits is 2667168, while the sum is 55.

The square root of 138797497 is about 11781.2349522450. The cubic root of 138797497 is about 517.7584690624.

The spelling of 138797497 in words is "one hundred thirty-eight million, seven hundred ninety-seven thousand, four hundred ninety-seven".