696784189697 has 8 divisors (see below), whose sum is σ = 697913590440. Its totient is φ = 695654922240.

The previous prime is 696784189681. The next prime is 696784189789. The reversal of 696784189697 is 796981487696.

It is a Cunningham number, because it is equal to 834736²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 109061099536 + 587723090161 = 330244^2 + 766631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 696784189697 - 2⁴ = 696784189681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696784189637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20221079 + ... + 20255507.

It is an arithmetic number, because the mean of its divisors is an integer number (87239198805).

Almost surely, 2^696784189697 is an apocalyptic number.

It is an amenable number.

696784189697 is a deficient number, since it is larger than the sum of its proper divisors (1129400743).

696784189697 is a wasteful number, since it uses less digits than its factorization.

696784189697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66643.

The product of its digits is 1975228416, while the sum is 80.

The spelling of 696784189697 in words is "six hundred ninety-six billion, seven hundred eighty-four million, one hundred eighty-nine thousand, six hundred ninety-seven".