772623161 has 2 divisors, whose sum is σ = 772623162. Its totient is φ = 772623160.

The previous prime is 772623143. The next prime is 772623211. The reversal of 772623161 is 161326277.

772623161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390655225 + 381967936 = 19765^2 + 19544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772623161 is a prime.

It is not a weakly prime, because it can be changed into another prime (772623101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386311580 + 386311581.

It is an arithmetic number, because the mean of its divisors is an integer number (386311581).

Almost surely, 2^772623161 is an apocalyptic number.

It is an amenable number.

772623161 is a deficient number, since it is larger than the sum of its proper divisors (1).

772623161 is an equidigital number, since it uses as much as digits as its factorization.

772623161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 772623161 is about 27796.0997443886. The cubic root of 772623161 is about 917.6052879293.

The spelling of 772623161 in words is "seven hundred seventy-two million, six hundred twenty-three thousand, one hundred sixty-one".