1139399 has 4 divisors (see below), whose sum is σ = 1141536. Its totient is φ = 1137264.

The previous prime is 1139393. The next prime is 1139407. The reversal of 1139399 is 9939311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9939311 = 3011 ⋅3301.

It is a cyclic number.

It is not a de Polignac number, because 1139399 - 2⁸ = 1139143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139393) 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, 482 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (285384).

2^1139399 is an apocalyptic number.

1139399 is a deficient number, since it is larger than the sum of its proper divisors (2137).

1139399 is a wasteful number, since it uses less digits than its factorization.

1139399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its digits is 6561, while the sum is 35.

The square root of 1139399 is about 1067.4263440631. The cubic root of 1139399 is about 104.4460318237.

The spelling of 1139399 in words is "one million, one hundred thirty-nine thousand, three hundred ninety-nine".