68388239 has 8 divisors (see below), whose sum is σ = 72065280. Its totient is φ = 64719000.

The previous prime is 68388227. The next prime is 68388283. The reversal of 68388239 is 93288386.

It is a happy number.

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 68388239 - 2¹² = 68384143 is a prime.

It is a super-2 number, since 2×68388239² = 9353902467042242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68388193 and 68388202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68388209) 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, 27914 + ... + 30264.

It is an arithmetic number, because the mean of its divisors is an integer number (9008160).

Almost surely, 2^68388239 is an apocalyptic number.

68388239 is a deficient number, since it is larger than the sum of its proper divisors (3677041).

68388239 is a wasteful number, since it uses less digits than its factorization.

68388239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901.

The product of its digits is 497664, while the sum is 47.

The square root of 68388239 is about 8269.7181935057. The cubic root of 68388239 is about 408.9408295110.

The spelling of 68388239 in words is "sixty-eight million, three hundred eighty-eight thousand, two hundred thirty-nine".