694404497 has 2 divisors, whose sum is σ = 694404498. Its totient is φ = 694404496.

The previous prime is 694404479. The next prime is 694404521. The reversal of 694404497 is 794404496.

Together with previous prime (694404479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694006336 + 398161 = 26344^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 694404497 - 2⁸ = 694404241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (694404437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347202248 + 347202249.

It is an arithmetic number, because the mean of its divisors is an integer number (347202249).

Almost surely, 2^694404497 is an apocalyptic number.

It is an amenable number.

694404497 is a deficient number, since it is larger than the sum of its proper divisors (1).

694404497 is an equidigital number, since it uses as much as digits as its factorization.

694404497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 694404497 is about 26351.5558743692. Note that the first 3 decimals coincide. The cubic root of 694404497 is about 885.5318271289.

Subtracting 694404497 from its reverse (794404496), we obtain a palindrome (99999999).

It can be divided in two parts, 69440 and 4497, that added together give a palindrome (73937).

The spelling of 694404497 in words is "six hundred ninety-four million, four hundred four thousand, four hundred ninety-seven".