772362221 has 2 divisors, whose sum is σ = 772362222. Its totient is φ = 772362220.

The previous prime is 772362197. The next prime is 772362263. The reversal of 772362221 is 122263277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 691164100 + 81198121 = 26290^2 + 9011^2 .

It is an emirp because it is prime and its reverse (122263277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772362221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772362281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386181110 + 386181111.

It is an arithmetic number, because the mean of its divisors is an integer number (386181111).

Almost surely, 2^772362221 is an apocalyptic number.

It is an amenable number.

772362221 is a deficient number, since it is larger than the sum of its proper divisors (1).

772362221 is an equidigital number, since it uses as much as digits as its factorization.

772362221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 32.

The square root of 772362221 is about 27791.4055240105. The cubic root of 772362221 is about 917.5019745693.

The spelling of 772362221 in words is "seven hundred seventy-two million, three hundred sixty-two thousand, two hundred twenty-one".