775530979 has 2 divisors, whose sum is σ = 775530980. Its totient is φ = 775530978.

The previous prime is 775530919. The next prime is 775530983. The reversal of 775530979 is 979035577.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 775530979 - 2⁷ = 775530851 is a prime.

It is not a weakly prime, because it can be changed into another prime (775530919) 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, 387765489 + 387765490.

It is an arithmetic number, because the mean of its divisors is an integer number (387765490).

Almost surely, 2^775530979 is an apocalyptic number.

775530979 is a deficient number, since it is larger than the sum of its proper divisors (1).

775530979 is an equidigital number, since it uses as much as digits as its factorization.

775530979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2083725, while the sum is 52.

The square root of 775530979 is about 27848.3568456022. The cubic root of 775530979 is about 918.7550027093.

The spelling of 775530979 in words is "seven hundred seventy-five million, five hundred thirty thousand, nine hundred seventy-nine".