775632461 has 2 divisors, whose sum is σ = 775632462. Its totient is φ = 775632460.

The previous prime is 775632457. The next prime is 775632509. The reversal of 775632461 is 164236577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723287236 + 52345225 = 26894^2 + 7235^2 .

It is an emirp because it is prime and its reverse (164236577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 775632461 - 2² = 775632457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775632161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387816230 + 387816231.

It is an arithmetic number, because the mean of its divisors is an integer number (387816231).

Almost surely, 2^775632461 is an apocalyptic number.

It is an amenable number.

775632461 is a deficient number, since it is larger than the sum of its proper divisors (1).

775632461 is an equidigital number, since it uses as much as digits as its factorization.

775632461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 41.

The square root of 775632461 is about 27850.1788324599. The cubic root of 775632461 is about 918.7950754814.

The spelling of 775632461 in words is "seven hundred seventy-five million, six hundred thirty-two thousand, four hundred sixty-one".