770631161 has 2 divisors, whose sum is σ = 770631162. Its totient is φ = 770631160.

The previous prime is 770631157. The next prime is 770631163. The reversal of 770631161 is 161136077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763969600 + 6661561 = 27640^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 770631161 - 2² = 770631157 is a prime.

Together with 770631163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (770631163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385315580 + 385315581.

It is an arithmetic number, because the mean of its divisors is an integer number (385315581).

Almost surely, 2^770631161 is an apocalyptic number.

It is an amenable number.

770631161 is a deficient number, since it is larger than the sum of its proper divisors (1).

770631161 is an equidigital number, since it uses as much as digits as its factorization.

770631161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 770631161 is about 27760.2442532482. The cubic root of 770631161 is about 916.8160101506.

The spelling of 770631161 in words is "seven hundred seventy million, six hundred thirty-one thousand, one hundred sixty-one".