696728861 has 2 divisors, whose sum is σ = 696728862. Its totient is φ = 696728860.

The previous prime is 696728839. The next prime is 696728869. The reversal of 696728861 is 168827696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349465636 + 347263225 = 18694^2 + 18635^2 .

It is a cyclic number.

It is not a de Polignac number, because 696728861 - 2⁶ = 696728797 is a prime.

It is a super-2 number, since 2×696728861² = 970862211500714642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696728869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348364430 + 348364431.

It is an arithmetic number, because the mean of its divisors is an integer number (348364431).

Almost surely, 2^696728861 is an apocalyptic number.

It is an amenable number.

696728861 is a deficient number, since it is larger than the sum of its proper divisors (1).

696728861 is an equidigital number, since it uses as much as digits as its factorization.

696728861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 696728861 is about 26395.6220044158. The cubic root of 696728861 is about 886.5187667802.

The spelling of 696728861 in words is "six hundred ninety-six million, seven hundred twenty-eight thousand, eight hundred sixty-one".