1139687 has 2 divisors, whose sum is σ = 1139688. Its totient is φ = 1139686.

The previous prime is 1139683. The next prime is 1139713. The reversal of 1139687 is 7869311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1139687 - 2² = 1139683 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569843 + 569844.

It is an arithmetic number, because the mean of its divisors is an integer number (569844).

2^1139687 is an apocalyptic number.

1139687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139687 is an equidigital number, since it uses as much as digits as its factorization.

1139687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 1139687 is about 1067.5612394612. The cubic root of 1139687 is about 104.4548311770.

The spelling of 1139687 in words is "one million, one hundred thirty-nine thousand, six hundred eighty-seven".