68770209 has 4 divisors (see below), whose sum is σ = 91693616. Its totient is φ = 45846804.

The previous prime is 68770159. The next prime is 68770217. The reversal of 68770209 is 90207786.

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 not a de Polignac number, because 68770209 - 2¹⁵ = 68737441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68770109) 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 3 ways as a sum of consecutive naturals, for example, 11461699 + ... + 11461704.

It is an arithmetic number, because the mean of its divisors is an integer number (22923404).

Almost surely, 2^68770209 is an apocalyptic number.

It is an amenable number.

68770209 is a deficient number, since it is larger than the sum of its proper divisors (22923407).

68770209 is a wasteful number, since it uses less digits than its factorization.

68770209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22923406.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 68770209 is about 8292.7805348990. The cubic root of 68770209 is about 409.7007711584.

The spelling of 68770209 in words is "sixty-eight million, seven hundred seventy thousand, two hundred nine".