1068639 has 32 divisors (see below), whose sum is σ = 1741824. Its totient is φ = 574080.

The previous prime is 1068631. The next prime is 1068677. The reversal of 1068639 is 9368601.

It is not a de Polignac number, because 1068639 - 2³ = 1068631 is a prime.

It is a super-2 number, since 2×1068639² = 2283978624642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068631) 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 in 31 ways as a sum of consecutive naturals, for example, 20137 + ... + 20189.

It is an arithmetic number, because the mean of its divisors is an integer number (54432).

2^1068639 is an apocalyptic number.

1068639 is a deficient number, since it is larger than the sum of its proper divisors (673185).

1068639 is a wasteful number, since it uses less digits than its factorization.

1068639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1068639 is about 1033.7499697703. The cubic root of 1068639 is about 102.2375279452.

The spelling of 1068639 in words is "one million, sixty-eight thousand, six hundred thirty-nine".