1103639 has 2 divisors, whose sum is σ = 1103640. Its totient is φ = 1103638.

The previous prime is 1103633. The next prime is 1103699. The reversal of 1103639 is 9363011.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103633) 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, 551819 + 551820.

It is an arithmetic number, because the mean of its divisors is an integer number (551820).

2^1103639 is an apocalyptic number.

1103639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103639 is an equidigital number, since it uses as much as digits as its factorization.

1103639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1103639 is about 1050.5422409404. The cubic root of 1103639 is about 103.3417185934.

The spelling of 1103639 in words is "one million, one hundred three thousand, six hundred thirty-nine".