76202821 has 2 divisors, whose sum is σ = 76202822. Its totient is φ = 76202820.

The previous prime is 76202803. The next prime is 76202827. The reversal of 76202821 is 12820267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 2070721 = 8610^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 76202821 - 2¹⁵ = 76170053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76202821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76202827) 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 as a sum of consecutive naturals, namely, 38101410 + 38101411.

It is an arithmetic number, because the mean of its divisors is an integer number (38101411).

Almost surely, 2^76202821 is an apocalyptic number.

It is an amenable number.

76202821 is a deficient number, since it is larger than the sum of its proper divisors (1).

76202821 is an equidigital number, since it uses as much as digits as its factorization.

76202821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 76202821 is about 8729.4227185994. The cubic root of 76202821 is about 423.9588281044.

The spelling of 76202821 in words is "seventy-six million, two hundred two thousand, eight hundred twenty-one".