1139387 has 2 divisors, whose sum is σ = 1139388. Its totient is φ = 1139386.

The previous prime is 1139353. The next prime is 1139393. The reversal of 1139387 is 7839311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1139387 - 2¹⁰ = 1138363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1139087) 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 as a sum of consecutive naturals, namely, 569693 + 569694.

It is an arithmetic number, because the mean of its divisors is an integer number (569694).

2^1139387 is an apocalyptic number.

1139387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139387 is an equidigital number, since it uses as much as digits as its factorization.

1139387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 1139387 is about 1067.4207230516. The cubic root of 1139387 is about 104.4456651518.

The spelling of 1139387 in words is "one million, one hundred thirty-nine thousand, three hundred eighty-seven".