775620673 has 4 divisors (see below), whose sum is σ = 788335828. Its totient is φ = 762905520.

The previous prime is 775620661. The next prime is 775620683. The reversal of 775620673 is 376026577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376026577 = 73 ⋅5151049.

It can be written as a sum of positive squares in 2 ways, for example, as 16507969 + 759112704 = 4063^2 + 27552^2 .

It is a cyclic number.

It is not a de Polignac number, because 775620673 - 2⁹ = 775620161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775620613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6357486 + ... + 6357607.

It is an arithmetic number, because the mean of its divisors is an integer number (197083957).

Almost surely, 2^775620673 is an apocalyptic number.

It is an amenable number.

775620673 is a deficient number, since it is larger than the sum of its proper divisors (12715155).

775620673 is a wasteful number, since it uses less digits than its factorization.

775620673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12715154.

The product of its (nonzero) digits is 370440, while the sum is 43.

The square root of 775620673 is about 27849.9671992626. The cubic root of 775620673 is about 918.7904208665.

The spelling of 775620673 in words is "seven hundred seventy-five million, six hundred twenty thousand, six hundred seventy-three".