68238493 has 16 divisors (see below), whose sum is σ = 75859200. Its totient is φ = 61053696.

The previous prime is 68238491. The next prime is 68238503. The reversal of 68238493 is 39483286.

It is a cyclic number.

It is not a de Polignac number, because 68238493 - 2¹ = 68238491 is a prime.

It is a super-2 number, since 2×68238493² = 9312983853822098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68238491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77371 + ... + 78247.

It is an arithmetic number, because the mean of its divisors is an integer number (4741200).

Almost surely, 2^68238493 is an apocalyptic number.

It is an amenable number.

68238493 is a deficient number, since it is larger than the sum of its proper divisors (7620707).

68238493 is a wasteful number, since it uses less digits than its factorization.

68238493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116.

The product of its digits is 248832, while the sum is 43.

The square root of 68238493 is about 8260.6593562500. The cubic root of 68238493 is about 408.6421329088.

The spelling of 68238493 in words is "sixty-eight million, two hundred thirty-eight thousand, four hundred ninety-three".