775650979 has 2 divisors, whose sum is σ = 775650980. Its totient is φ = 775650978.

The previous prime is 775650961. The next prime is 775650991. The reversal of 775650979 is 979056577.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 775650979 - 2⁵ = 775650947 is a prime.

It is not a weakly prime, because it can be changed into another prime (775650679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387825489 + 387825490.

It is an arithmetic number, because the mean of its divisors is an integer number (387825490).

Almost surely, 2^775650979 is an apocalyptic number.

775650979 is a deficient number, since it is larger than the sum of its proper divisors (1).

775650979 is an equidigital number, since it uses as much as digits as its factorization.

775650979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4167450, while the sum is 55.

The square root of 775650979 is about 27850.5112879459. The cubic root of 775650979 is about 918.8023874119.

The spelling of 775650979 in words is "seven hundred seventy-five million, six hundred fifty thousand, nine hundred seventy-nine".