68365831 has 4 divisors (see below), whose sum is σ = 69004872. Its totient is φ = 67726792.

The previous prime is 68365799. The next prime is 68365841. The reversal of 68365831 is 13856386.

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

It is a cyclic number.

It is not a de Polignac number, because 68365831 - 2⁵ = 68365799 is a prime.

It is a super-2 number, since 2×68365831² = 9347773696641122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68365841) 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, 319360 + ... + 319573.

It is an arithmetic number, because the mean of its divisors is an integer number (17251218).

Almost surely, 2^68365831 is an apocalyptic number.

68365831 is a deficient number, since it is larger than the sum of its proper divisors (639041).

68365831 is a wasteful number, since it uses less digits than its factorization.

68365831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639040.

The product of its digits is 103680, while the sum is 40.

The square root of 68365831 is about 8268.3632600413. The cubic root of 68365831 is about 408.8961602947.

It can be divided in two parts, 68365 and 831, that added together give a palindrome (69196).

The spelling of 68365831 in words is "sixty-eight million, three hundred sixty-five thousand, eight hundred thirty-one".