772276649 has 2 divisors, whose sum is σ = 772276650. Its totient is φ = 772276648.

The previous prime is 772276597. The next prime is 772276651. The reversal of 772276649 is 946672277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487747225 + 284529424 = 22085^2 + 16868^2 .

It is an emirp because it is prime and its reverse (946672277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772276649 is a prime.

It is a super-2 number, since 2×772276649² = 1192822445181338402, which contains 22 as substring.

Together with 772276651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 772276597 and 772276606.

It is not a weakly prime, because it can be changed into another prime (772276949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386138324 + 386138325.

It is an arithmetic number, because the mean of its divisors is an integer number (386138325).

Almost surely, 2^772276649 is an apocalyptic number.

It is an amenable number.

772276649 is a deficient number, since it is larger than the sum of its proper divisors (1).

772276649 is an equidigital number, since it uses as much as digits as its factorization.

772276649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 50.

The square root of 772276649 is about 27789.8659406626. The cubic root of 772276649 is about 917.4680891821.

The spelling of 772276649 in words is "seven hundred seventy-two million, two hundred seventy-six thousand, six hundred forty-nine".