770940857 has 2 divisors, whose sum is σ = 770940858. Its totient is φ = 770940856.

The previous prime is 770940853. The next prime is 770940923. The reversal of 770940857 is 758049077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 721674496 + 49266361 = 26864^2 + 7019^2 .

It is an emirp because it is prime and its reverse (758049077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 770940857 - 2² = 770940853 is a prime.

It is not a weakly prime, because it can be changed into another prime (770940853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385470428 + 385470429.

It is an arithmetic number, because the mean of its divisors is an integer number (385470429).

Almost surely, 2^770940857 is an apocalyptic number.

It is an amenable number.

770940857 is a deficient number, since it is larger than the sum of its proper divisors (1).

770940857 is an equidigital number, since it uses as much as digits as its factorization.

770940857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 770940857 is about 27765.8217418466. The cubic root of 770940857 is about 916.9388082927.

The spelling of 770940857 in words is "seven hundred seventy million, nine hundred forty thousand, eight hundred fifty-seven".