774222913 has 2 divisors, whose sum is σ = 774222914. Its totient is φ = 774222912.

The previous prime is 774222901. The next prime is 774222929. The reversal of 774222913 is 319222477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 700555024 + 73667889 = 26468^2 + 8583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774222913 is a prime.

It is a super-2 number, since 2×774222913² = 1198842238028411138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (774222973) 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, 387111456 + 387111457.

It is an arithmetic number, because the mean of its divisors is an integer number (387111457).

Almost surely, 2^774222913 is an apocalyptic number.

It is an amenable number.

774222913 is a deficient number, since it is larger than the sum of its proper divisors (1).

774222913 is an equidigital number, since it uses as much as digits as its factorization.

774222913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 774222913 is about 27824.8614192416. The cubic root of 774222913 is about 918.2381660627.

The spelling of 774222913 in words is "seven hundred seventy-four million, two hundred twenty-two thousand, nine hundred thirteen".