76107221 has 2 divisors, whose sum is σ = 76107222. Its totient is φ = 76107220.

The previous prime is 76107211. The next prime is 76107247. The reversal of 76107221 is 12270167.

It is an a-pointer prime, because the next prime (76107247) can be obtained adding 76107221 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 26122321 = 7070^2 + 5111^2 .

It is a cyclic number.

It is not a de Polignac number, because 76107221 - 2¹⁰ = 76106197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76107211) 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, 38053610 + 38053611.

It is an arithmetic number, because the mean of its divisors is an integer number (38053611).

Almost surely, 2^76107221 is an apocalyptic number.

It is an amenable number.

76107221 is a deficient number, since it is larger than the sum of its proper divisors (1).

76107221 is an equidigital number, since it uses as much as digits as its factorization.

76107221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 76107221 is about 8723.9452657614. The cubic root of 76107221 is about 423.7814618583.

Adding to 76107221 its reverse (12270167), we get a palindrome (88377388).

The spelling of 76107221 in words is "seventy-six million, one hundred seven thousand, two hundred twenty-one".