770641 has 2 divisors, whose sum is σ = 770642. Its totient is φ = 770640.

The previous prime is 770639. The next prime is 770647. The reversal of 770641 is 146077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484416 + 286225 = 696^2 + 535^2 .

It is an emirp because it is prime and its reverse (146077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 770641 - 2¹ = 770639 is a prime.

Together with 770639, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (770647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385320 + 385321.

It is an arithmetic number, because the mean of its divisors is an integer number (385321).

2⁷⁷⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

770641 is a deficient number, since it is larger than the sum of its proper divisors (1).

770641 is an equidigital number, since it uses as much as digits as its factorization.

770641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 770641 is about 877.8616064050. The cubic root of 770641 is about 91.6819911937.

The spelling of 770641 in words is "seven hundred seventy thousand, six hundred forty-one".