1138779 has 20 divisors (see below), whose sum is σ = 1803384. Its totient is φ = 713664.

The previous prime is 1138777. The next prime is 1138793. The reversal of 1138779 is 9778311.

It is not a de Polignac number, because 1138779 - 2¹ = 1138777 is a prime.

It is a super-2 number, since 2×1138779² = 2593635221682, which contains 22 as substring.

1138779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1138771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 964 + ... + 1790.

2^1138779 is an apocalyptic number.

1138779 is a deficient number, since it is larger than the sum of its proper divisors (664605).

1138779 is an equidigital number, since it uses as much as digits as its factorization.

1138779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 847 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 1138779 is about 1067.1358863800. The cubic root of 1138779 is about 104.4270837382.

The spelling of 1138779 in words is "one million, one hundred thirty-eight thousand, seven hundred seventy-nine".