68211813 has 8 divisors (see below), whose sum is σ = 94903488. Its totient is φ = 43497344.

The previous prime is 68211809. The next prime is 68211883. The reversal of 68211813 is 31811286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68211813 - 2² = 68211809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68211883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494220 + ... + 494357.

It is an arithmetic number, because the mean of its divisors is an integer number (11862936).

Almost surely, 2^68211813 is an apocalyptic number.

It is an amenable number.

68211813 is a deficient number, since it is larger than the sum of its proper divisors (26691675).

68211813 is a wasteful number, since it uses less digits than its factorization.

68211813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988603.

The product of its digits is 2304, while the sum is 30.

The square root of 68211813 is about 8259.0443151735. The cubic root of 68211813 is about 408.5888687718.

The spelling of 68211813 in words is "sixty-eight million, two hundred eleven thousand, eight hundred thirteen".