775689001 has 2 divisors, whose sum is σ = 775689002. Its totient is φ = 775689000.

The previous prime is 775688981. The next prime is 775689043. The reversal of 775689001 is 100986577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711608976 + 64080025 = 26676^2 + 8005^2 .

It is a cyclic number.

It is not a de Polignac number, because 775689001 - 2¹¹ = 775686953 is a prime.

It is not a weakly prime, because it can be changed into another prime (775689401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387844500 + 387844501.

It is an arithmetic number, because the mean of its divisors is an integer number (387844501).

Almost surely, 2^775689001 is an apocalyptic number.

It is an amenable number.

775689001 is a deficient number, since it is larger than the sum of its proper divisors (1).

775689001 is an equidigital number, since it uses as much as digits as its factorization.

775689001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 775689001 is about 27851.1938882339. The cubic root of 775689001 is about 918.8174002353.

The spelling of 775689001 in words is "seven hundred seventy-five million, six hundred eighty-nine thousand, one".