774408961 has 2 divisors, whose sum is σ = 774408962. Its totient is φ = 774408960.

The previous prime is 774408941. The next prime is 774408979. The reversal of 774408961 is 169804477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763969600 + 10439361 = 27640^2 + 3231^2 .

It is a cyclic number.

It is not a de Polignac number, because 774408961 - 2⁹ = 774408449 is a prime.

It is not a weakly prime, because it can be changed into another prime (774408931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387204480 + 387204481.

It is an arithmetic number, because the mean of its divisors is an integer number (387204481).

Almost surely, 2^774408961 is an apocalyptic number.

It is an amenable number.

774408961 is a deficient number, since it is larger than the sum of its proper divisors (1).

774408961 is an equidigital number, since it uses as much as digits as its factorization.

774408961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 774408961 is about 27828.2044156643. The cubic root of 774408961 is about 918.3117119322.

The spelling of 774408961 in words is "seven hundred seventy-four million, four hundred eight thousand, nine hundred sixty-one".