694366997 has 2 divisors, whose sum is σ = 694366998. Its totient is φ = 694366996.

The previous prime is 694366909. The next prime is 694366999. The reversal of 694366997 is 799663496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413268241 + 281098756 = 20329^2 + 16766^2 .

It is a cyclic number.

It is not a de Polignac number, because 694366997 - 2¹² = 694362901 is a prime.

Together with 694366999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694366999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347183498 + 347183499.

It is an arithmetic number, because the mean of its divisors is an integer number (347183499).

Almost surely, 2^694366997 is an apocalyptic number.

It is an amenable number.

694366997 is a deficient number, since it is larger than the sum of its proper divisors (1).

694366997 is an equidigital number, since it uses as much as digits as its factorization.

694366997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 59.

The square root of 694366997 is about 26350.8443318236. The cubic root of 694366997 is about 885.5158863521.

The spelling of 694366997 in words is "six hundred ninety-four million, three hundred sixty-six thousand, nine hundred ninety-seven".