76000021 has 2 divisors, whose sum is σ = 76000022. Its totient is φ = 76000020.

The previous prime is 75999997. The next prime is 76000063. The reversal of 76000021 is 12000067.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 29008996 = 6855^2 + 5386^2 .

It is a cyclic number.

It is not a de Polignac number, because 76000021 - 2²³ = 67611413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75999959 and 76000004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76000091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38000010 + 38000011.

It is an arithmetic number, because the mean of its divisors is an integer number (38000011).

Almost surely, 2^76000021 is an apocalyptic number.

It is an amenable number.

76000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

76000021 is an equidigital number, since it uses as much as digits as its factorization.

76000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 76000021 is about 8717.7990915139. The cubic root of 76000021 is about 423.5823974397.

Adding to 76000021 its reverse (12000067), we get a palindrome (88000088).

The spelling of 76000021 in words is "seventy-six million, twenty-one", and thus it is an aban number and an uban number.