68463209 has 4 divisors (see below), whose sum is σ = 70313604. Its totient is φ = 66612816.

The previous prime is 68463169. The next prime is 68463211. The reversal of 68463209 is 90236486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29463184 + 39000025 = 5428^2 + 6245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68463209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68463509) 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, 925142 + ... + 925215.

It is an arithmetic number, because the mean of its divisors is an integer number (17578401).

Almost surely, 2^68463209 is an apocalyptic number.

It is an amenable number.

68463209 is a deficient number, since it is larger than the sum of its proper divisors (1850395).

68463209 is a wasteful number, since it uses less digits than its factorization.

68463209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850394.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 68463209 is about 8274.2497545095. The cubic root of 68463209 is about 409.0902075244.

The spelling of 68463209 in words is "sixty-eight million, four hundred sixty-three thousand, two hundred nine".