138499249 has 8 divisors (see below), whose sum is σ = 158757248. Its totient is φ = 118359360.

The previous prime is 138499247. The next prime is 138499253. The reversal of 138499249 is 942994831.

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

It is not a de Polignac number, because 138499249 - 2¹ = 138499247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138499247) 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, 26997 + ... + 31714.

It is an arithmetic number, because the mean of its divisors is an integer number (19844656).

Almost surely, 2^138499249 is an apocalyptic number.

It is an amenable number.

138499249 is a deficient number, since it is larger than the sum of its proper divisors (20257999).

138499249 is an equidigital number, since it uses as much as digits as its factorization.

138499249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59055.

The product of its digits is 559872, while the sum is 49.

The square root of 138499249 is about 11768.5703889640. The cubic root of 138499249 is about 517.3873500590.

The spelling of 138499249 in words is "one hundred thirty-eight million, four hundred ninety-nine thousand, two hundred forty-nine".