774500641 has 2 divisors, whose sum is σ = 774500642. Its totient is φ = 774500640.

The previous prime is 774500627. The next prime is 774500647. The reversal of 774500641 is 146005477.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497111616 + 277389025 = 22296^2 + 16655^2 .

It is an emirp because it is prime and its reverse (146005477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 774500641 - 2⁷ = 774500513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 774500597 and 774500606.

It is not a weakly prime, because it can be changed into another prime (774500647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387250320 + 387250321.

It is an arithmetic number, because the mean of its divisors is an integer number (387250321).

Almost surely, 2^774500641 is an apocalyptic number.

It is an amenable number.

774500641 is a deficient number, since it is larger than the sum of its proper divisors (1).

774500641 is an equidigital number, since it uses as much as digits as its factorization.

774500641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 774500641 is about 27829.8516165645. The cubic root of 774500641 is about 918.3479492435.

The spelling of 774500641 in words is "seven hundred seventy-four million, five hundred thousand, six hundred forty-one".