68182639 has 4 divisors (see below), whose sum is σ = 77923024. Its totient is φ = 58442256.

The previous prime is 68182627. The next prime is 68182643. The reversal of 68182639 is 93628186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68182639 is a prime.

It is a super-2 number, since 2×68182639² = 9297744522008642, 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 = 68182595 and 68182604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68182619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4870182 + ... + 4870195.

It is an arithmetic number, because the mean of its divisors is an integer number (19480756).

Almost surely, 2^68182639 is an apocalyptic number.

68182639 is a deficient number, since it is larger than the sum of its proper divisors (9740385).

68182639 is an equidigital number, since it uses as much as digits as its factorization.

68182639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740384.

The product of its digits is 124416, while the sum is 43.

The square root of 68182639 is about 8257.2779413073. The cubic root of 68182639 is about 408.5306096964.

The spelling of 68182639 in words is "sixty-eight million, one hundred eighty-two thousand, six hundred thirty-nine".