694307228581 has 2 divisors, whose sum is σ = 694307228582. Its totient is φ = 694307228580.

The previous prime is 694307228383. The next prime is 694307228591. The reversal of 694307228581 is 185822703496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553632724225 + 140674504356 = 744065^2 + 375066^2 .

It is a cyclic number.

It is not a de Polignac number, because 694307228581 - 2¹⁹ = 694306704293 is a prime.

It is a super-2 number, since 2×694307228581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694307228591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347153614290 + 347153614291.

It is an arithmetic number, because the mean of its divisors is an integer number (347153614291).

It is a 1-persistent number, because it is pandigital, but 2⋅694307228581 = 1388614457162 is not.

Almost surely, 2^694307228581 is an apocalyptic number.

It is an amenable number.

694307228581 is a deficient number, since it is larger than the sum of its proper divisors (1).

694307228581 is an equidigital number, since it uses as much as digits as its factorization.

694307228581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 694307228581 in words is "six hundred ninety-four billion, three hundred seven million, two hundred twenty-eight thousand, five hundred eighty-one".