68330813 has 4 divisors (see below), whose sum is σ = 69195840. Its totient is φ = 67465788.

The previous prime is 68330807. The next prime is 68330863. The reversal of 68330813 is 31803386.

It is a happy number.

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 68330813 - 2⁸ = 68330557 is a prime.

It is a super-3 number, since 3×68330813³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68330813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68330863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432395 + ... + 432552.

It is an arithmetic number, because the mean of its divisors is an integer number (17298960).

Almost surely, 2^68330813 is an apocalyptic number.

It is an amenable number.

68330813 is a deficient number, since it is larger than the sum of its proper divisors (865027).

68330813 is an equidigital number, since it uses as much as digits as its factorization.

68330813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865026.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 68330813 is about 8266.2453992124. The cubic root of 68330813 is about 408.8263341306.

The spelling of 68330813 in words is "sixty-eight million, three hundred thirty thousand, eight hundred thirteen".