68464813 has 4 divisors (see below), whose sum is σ = 71441568. Its totient is φ = 65488060.

The previous prime is 68464787. The next prime is 68464871. The reversal of 68464813 is 31846486.

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 68464813 - 2¹³ = 68456621 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68464883) 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, 1488343 + ... + 1488388.

It is an arithmetic number, because the mean of its divisors is an integer number (17860392).

Almost surely, 2^68464813 is an apocalyptic number.

It is an amenable number.

68464813 is a deficient number, since it is larger than the sum of its proper divisors (2976755).

68464813 is a wasteful number, since it uses less digits than its factorization.

68464813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976754.

The product of its digits is 110592, while the sum is 40.

The square root of 68464813 is about 8274.3466811586. The cubic root of 68464813 is about 409.0934023088.

The spelling of 68464813 in words is "sixty-eight million, four hundred sixty-four thousand, eight hundred thirteen".