68939493 has 8 divisors (see below), whose sum is σ = 105050688. Its totient is φ = 39393984.

The previous prime is 68939477. The next prime is 68939501. The reversal of 68939493 is 39493986.

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

It is not a de Polignac number, because 68939493 - 2⁴ = 68939477 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68939593) 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, 1641396 + ... + 1641437.

It is an arithmetic number, because the mean of its divisors is an integer number (13131336).

Almost surely, 2^68939493 is an apocalyptic number.

It is an amenable number.

68939493 is a deficient number, since it is larger than the sum of its proper divisors (36111195).

68939493 is a wasteful number, since it uses less digits than its factorization.

68939493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282843.

The product of its digits is 1259712, while the sum is 51.

The square root of 68939493 is about 8302.9809707117. The cubic root of 68939493 is about 410.0366673532.

The spelling of 68939493 in words is "sixty-eight million, nine hundred thirty-nine thousand, four hundred ninety-three".