76221401 has 2 divisors, whose sum is σ = 76221402. Its totient is φ = 76221400.

The previous prime is 76221377. The next prime is 76221403. The reversal of 76221401 is 10412267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65593801 + 10627600 = 8099^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 76221401 - 2¹⁰ = 76220377 is a prime.

It is a Sophie Germain prime.

Together with 76221403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (76221403) 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, 38110700 + 38110701.

It is an arithmetic number, because the mean of its divisors is an integer number (38110701).

Almost surely, 2^76221401 is an apocalyptic number.

It is an amenable number.

76221401 is a deficient number, since it is larger than the sum of its proper divisors (1).

76221401 is an equidigital number, since it uses as much as digits as its factorization.

76221401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 76221401 is about 8730.4868707306. The cubic root of 76221401 is about 423.9932822746.

Adding to 76221401 its reverse (10412267), we get a palindrome (86633668).

The spelling of 76221401 in words is "seventy-six million, two hundred twenty-one thousand, four hundred one".