1138899 has 4 divisors (see below), whose sum is σ = 1518536. Its totient is φ = 759264.

The previous prime is 1138883. The next prime is 1138901. The reversal of 1138899 is 9988311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9988311 = 3 ⋅3329437.

It is not a de Polignac number, because 1138899 - 2⁴ = 1138883 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1138829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189814 + ... + 189819.

It is an arithmetic number, because the mean of its divisors is an integer number (379634).

2^1138899 is an apocalyptic number.

1138899 is a deficient number, since it is larger than the sum of its proper divisors (379637).

1138899 is an equidigital number, since it uses as much as digits as its factorization.

1138899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379636.

The product of its digits is 15552, while the sum is 39.

The square root of 1138899 is about 1067.1921101657. The cubic root of 1138899 is about 104.4307516462.

The spelling of 1138899 in words is "one million, one hundred thirty-eight thousand, eight hundred ninety-nine".