676037821 has 4 divisors (see below), whose sum is σ = 699349500. Its totient is φ = 652726144.

The previous prime is 676037819. The next prime is 676037833. The reversal of 676037821 is 128730676.

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

It can be written as a sum of positive squares in 2 ways, for example, as 331749796 + 344288025 = 18214^2 + 18555^2 .

It is a cyclic number.

It is not a de Polignac number, because 676037821 - 2¹ = 676037819 is a prime.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (676037851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11655796 + ... + 11655853.

It is an arithmetic number, because the mean of its divisors is an integer number (174837375).

Almost surely, 2^676037821 is an apocalyptic number.

It is an amenable number.

676037821 is a deficient number, since it is larger than the sum of its proper divisors (23311679).

676037821 is a wasteful number, since it uses less digits than its factorization.

676037821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23311678.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 676037821 is about 26000.7273167502. The cubic root of 676037821 is about 877.6546626626.

The spelling of 676037821 in words is "six hundred seventy-six million, thirty-seven thousand, eight hundred twenty-one".