68831213 has 6 divisors (see below), whose sum is σ = 75657582. Its totient is φ = 62573720.

The previous prime is 68831179. The next prime is 68831219. The reversal of 68831213 is 31213886.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38217124 + 30614089 = 6182^2 + 5533^2 .

It is not a de Polignac number, because 68831213 - 2⁶ = 68831149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68831213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68831219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284306 + ... + 284547.

It is an arithmetic number, because the mean of its divisors is an integer number (12609597).

Almost surely, 2^68831213 is an apocalyptic number.

It is an amenable number.

68831213 is a deficient number, since it is larger than the sum of its proper divisors (6826369).

68831213 is a wasteful number, since it uses less digits than its factorization.

68831213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568875 (or 568864 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 68831213 is about 8296.4578586286. The cubic root of 68831213 is about 409.8218797971.

The spelling of 68831213 in words is "sixty-eight million, eight hundred thirty-one thousand, two hundred thirteen".