1138879 has 8 divisors (see below), whose sum is σ = 1370240. Its totient is φ = 924696.

The previous prime is 1138867. The next prime is 1138883. The reversal of 1138879 is 9788311.

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 1138879 - 2⁷ = 1138751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138829) 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, 4149 + ... + 4414.

It is an arithmetic number, because the mean of its divisors is an integer number (171280).

2^1138879 is an apocalyptic number.

1138879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1138879 is a deficient number, since it is larger than the sum of its proper divisors (231361).

1138879 is an equidigital number, since it uses as much as digits as its factorization.

1138879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589.

The product of its digits is 12096, while the sum is 37.

The square root of 1138879 is about 1067.1827397405. The cubic root of 1138879 is about 104.4301403461.

The spelling of 1138879 in words is "one million, one hundred thirty-eight thousand, eight hundred seventy-nine".