774472649 has 2 divisors, whose sum is σ = 774472650. Its totient is φ = 774472648.

The previous prime is 774472619. The next prime is 774472651. The reversal of 774472649 is 946274477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 759994624 + 14478025 = 27568^2 + 3805^2 .

It is a cyclic number.

It is not a de Polignac number, because 774472649 - 2¹² = 774468553 is a prime.

Together with 774472651, 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 = 774472597 and 774472606.

It is not a weakly prime, because it can be changed into another prime (774472609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387236324 + 387236325.

It is an arithmetic number, because the mean of its divisors is an integer number (387236325).

Almost surely, 2^774472649 is an apocalyptic number.

It is an amenable number.

774472649 is a deficient number, since it is larger than the sum of its proper divisors (1).

774472649 is an equidigital number, since it uses as much as digits as its factorization.

774472649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 50.

The square root of 774472649 is about 27829.3486988108. The cubic root of 774472649 is about 918.3368854672.

The spelling of 774472649 in words is "seven hundred seventy-four million, four hundred seventy-two thousand, six hundred forty-nine".