780697 has 2 divisors, whose sum is σ = 780698. Its totient is φ = 780696.

The previous prime is 780683. The next prime is 780707. The reversal of 780697 is 796087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 732736 + 47961 = 856^2 + 219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780697 is a prime.

It is not a weakly prime, because it can be changed into another prime (780667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390348 + 390349.

It is an arithmetic number, because the mean of its divisors is an integer number (390349).

2⁷⁸⁰⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

780697 is a deficient number, since it is larger than the sum of its proper divisors (1).

780697 is an equidigital number, since it uses as much as digits as its factorization.

780697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 780697 is about 883.5705970662. The cubic root of 780697 is about 92.0790514629.

The spelling of 780697 in words is "seven hundred eighty thousand, six hundred ninety-seven".