68442009 has 16 divisors (see below), whose sum is σ = 96271680. Its totient is φ = 43130880.

The previous prime is 68441999. The next prime is 68442029. The reversal of 68442009 is 90024486.

It is not a de Polignac number, because 68442009 - 2⁴ = 68441993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68442029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31849 + ... + 33929.

It is an arithmetic number, because the mean of its divisors is an integer number (6016980).

Almost surely, 2^68442009 is an apocalyptic number.

It is an amenable number.

68442009 is a deficient number, since it is larger than the sum of its proper divisors (27829671).

68442009 is a wasteful number, since it uses less digits than its factorization.

68442009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 68442009 is about 8272.9685724050. The cubic root of 68442009 is about 409.0479775060.

The spelling of 68442009 in words is "sixty-eight million, four hundred forty-two thousand, nine".