68782831 has 24 divisors (see below), whose sum is σ = 81047040. Its totient is φ = 58125600.

The previous prime is 68782829. The next prime is 68782837. The reversal of 68782831 is 13828786.

It is a happy number.

It is not a de Polignac number, because 68782831 - 2¹ = 68782829 is a prime.

It is a super-2 number, since 2×68782831² = 9462155680749122, 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 (68782837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99196 + ... + 99886.

It is an arithmetic number, because the mean of its divisors is an integer number (3376960).

Almost surely, 2^68782831 is an apocalyptic number.

68782831 is a deficient number, since it is larger than the sum of its proper divisors (12264209).

68782831 is a wasteful number, since it uses less digits than its factorization.

68782831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 754 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 68782831 is about 8293.5415233783. The cubic root of 68782831 is about 409.7258349511.

The spelling of 68782831 in words is "sixty-eight million, seven hundred eighty-two thousand, eight hundred thirty-one".