138887499 has 8 divisors (see below), whose sum is σ = 185585152. Its totient is φ = 92390760.

The previous prime is 138887477. The next prime is 138887513. The reversal of 138887499 is 994788831.

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

It is not a de Polignac number, because 138887499 - 2¹² = 138883403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138886499) 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, 48607 + ... + 51384.

It is an arithmetic number, because the mean of its divisors is an integer number (23198144).

Almost surely, 2^138887499 is an apocalyptic number.

138887499 is a deficient number, since it is larger than the sum of its proper divisors (46697653).

138887499 is an equidigital number, since it uses as much as digits as its factorization.

138887499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100457.

The product of its digits is 3483648, while the sum is 57.

The square root of 138887499 is about 11785.0540516368. The cubic root of 138887499 is about 517.8703568367.

The spelling of 138887499 in words is "one hundred thirty-eight million, eight hundred eighty-seven thousand, four hundred ninety-nine".