693678613 has 2 divisors, whose sum is σ = 693678614. Its totient is φ = 693678612.

The previous prime is 693678571. The next prime is 693678647. The reversal of 693678613 is 316876396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691584804 + 2093809 = 26298^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 693678613 - 2¹³ = 693670421 is a prime.

It is a super-3 number, since 3×693678613³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (693678683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346839306 + 346839307.

It is an arithmetic number, because the mean of its divisors is an integer number (346839307).

Almost surely, 2^693678613 is an apocalyptic number.

It is an amenable number.

693678613 is a deficient number, since it is larger than the sum of its proper divisors (1).

693678613 is an equidigital number, since it uses as much as digits as its factorization.

693678613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 693678613 is about 26337.7791964319. The cubic root of 693678613 is about 885.2231609766.

The spelling of 693678613 in words is "six hundred ninety-three million, six hundred seventy-eight thousand, six hundred thirteen".