68884909 has 4 divisors (see below), whose sum is σ = 69410880. Its totient is φ = 68358940.

The previous prime is 68884903. The next prime is 68884951. The reversal of 68884909 is 90948886.

68884909 = 207² + 208² + ... + 599².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68884909 - 2⁵ = 68884877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68884903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262789 + ... + 263050.

It is an arithmetic number, because the mean of its divisors is an integer number (17352720).

Almost surely, 2^68884909 is an apocalyptic number.

It is an amenable number.

68884909 is a deficient number, since it is larger than the sum of its proper divisors (525971).

68884909 is a wasteful number, since it uses less digits than its factorization.

68884909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525970.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 68884909 is about 8299.6933075867. The cubic root of 68884909 is about 409.9284209764.

The spelling of 68884909 in words is "sixty-eight million, eight hundred eighty-four thousand, nine hundred nine".