1068445639 has 8 divisors (see below), whose sum is σ = 1150835840. Its totient is φ = 988671096.

The previous prime is 1068445613. The next prime is 1068445661. The reversal of 1068445639 is 9365448601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1068445639 - 2¹⁷ = 1068314567 is a prime.

It is a super-2 number, since 2×1068445639² = 2283152166996236642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068443639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653067 + ... + 654700.

It is an arithmetic number, because the mean of its divisors is an integer number (143854480).

Almost surely, 2^1068445639 is an apocalyptic number.

1068445639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1068445639 is a deficient number, since it is larger than the sum of its proper divisors (82390201).

1068445639 is a wasteful number, since it uses less digits than its factorization.

1068445639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307829.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 1068445639 is about 32687.0867316131. The cubic root of 1068445639 is about 1022.3136124056.

The spelling of 1068445639 in words is "one billion, sixty-eight million, four hundred forty-five thousand, six hundred thirty-nine".