772331281 has 2 divisors, whose sum is σ = 772331282. Its totient is φ = 772331280.

The previous prime is 772331257. The next prime is 772331333. The reversal of 772331281 is 182133277.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625800256 + 146531025 = 25016^2 + 12105^2 .

It is a cyclic number.

It is not a de Polignac number, because 772331281 - 2¹⁹ = 771806993 is a prime.

It is a super-2 number, since 2×772331281² = 1192991215222201922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (772331221) 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, 386165640 + 386165641.

It is an arithmetic number, because the mean of its divisors is an integer number (386165641).

Almost surely, 2^772331281 is an apocalyptic number.

It is an amenable number.

772331281 is a deficient number, since it is larger than the sum of its proper divisors (1).

772331281 is an equidigital number, since it uses as much as digits as its factorization.

772331281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 772331281 is about 27790.8488715260. The cubic root of 772331281 is about 917.4897230249.

The spelling of 772331281 in words is "seven hundred seventy-two million, three hundred thirty-one thousand, two hundred eighty-one".