694655993 has 2 divisors, whose sum is σ = 694655994. Its totient is φ = 694655992.

The previous prime is 694655987. The next prime is 694656007. The reversal of 694655993 is 399556496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551686144 + 142969849 = 23488^2 + 11957^2 .

It is a cyclic number.

It is not a de Polignac number, because 694655993 - 2¹⁴ = 694639609 is a prime.

It is a super-2 number, since 2×694655993² = 965093897221632098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (694655953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347327996 + 347327997.

It is an arithmetic number, because the mean of its divisors is an integer number (347327997).

Almost surely, 2^694655993 is an apocalyptic number.

It is an amenable number.

694655993 is a deficient number, since it is larger than the sum of its proper divisors (1).

694655993 is an equidigital number, since it uses as much as digits as its factorization.

694655993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7873200, while the sum is 56.

The square root of 694655993 is about 26356.3273807259. The cubic root of 694655993 is about 885.6387200769.

The spelling of 694655993 in words is "six hundred ninety-four million, six hundred fifty-five thousand, nine hundred ninety-three".