785861161 has 2 divisors, whose sum is σ = 785861162. Its totient is φ = 785861160.

The previous prime is 785861119. The next prime is 785861183. The reversal of 785861161 is 161168587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 466560000 + 319301161 = 21600^2 + 17869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-785861161 is a prime.

It is not a weakly prime, because it can be changed into another prime (785831161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392930580 + 392930581.

It is an arithmetic number, because the mean of its divisors is an integer number (392930581).

Almost surely, 2^785861161 is an apocalyptic number.

It is an amenable number.

785861161 is a deficient number, since it is larger than the sum of its proper divisors (1).

785861161 is an equidigital number, since it uses as much as digits as its factorization.

785861161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 785861161 is about 28033.2153168344. The cubic root of 785861161 is about 922.8163386087.

The spelling of 785861161 in words is "seven hundred eighty-five million, eight hundred sixty-one thousand, one hundred sixty-one".