76818213 has 20 divisors (see below), whose sum is σ = 115030828. Its totient is φ = 51088320.

The previous prime is 76818199. The next prime is 76818221. The reversal of 76818213 is 31281867.

It can be written as a sum of positive squares in 2 ways, for example, as 13089924 + 63728289 = 3618^2 + 7983^2 .

It is not a de Polignac number, because 76818213 - 2⁹ = 76817701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76818233) 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 19 ways as a sum of consecutive naturals, for example, 42945 + ... + 44697.

Almost surely, 2^76818213 is an apocalyptic number.

It is an amenable number.

76818213 is a deficient number, since it is larger than the sum of its proper divisors (38212615).

76818213 is a wasteful number, since it uses less digits than its factorization.

76818213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2297 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 76818213 is about 8764.5999908724. The cubic root of 76818213 is about 425.0970260598.

It can be divided in two parts, 768 and 18213, that added together give a palindrome (18981).

The spelling of 76818213 in words is "seventy-six million, eight hundred eighteen thousand, two hundred thirteen".