1139863 has 2 divisors, whose sum is σ = 1139864. Its totient is φ = 1139862.

The previous prime is 1139861. The next prime is 1139869. The reversal of 1139863 is 3689311.

It is a weak prime.

It is an emirp because it is prime and its reverse (3689311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1139863 - 2¹ = 1139861 is a prime.

Together with 1139861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569931 + 569932.

It is an arithmetic number, because the mean of its divisors is an integer number (569932).

2^1139863 is an apocalyptic number.

1139863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139863 is an equidigital number, since it uses as much as digits as its factorization.

1139863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 1139863 is about 1067.6436671474. The cubic root of 1139863 is about 104.4602078299.

It can be divided in two parts, 1139 and 863, that added together give a palindrome (2002).

The spelling of 1139863 in words is "one million, one hundred thirty-nine thousand, eight hundred sixty-three".