694164085 has 16 divisors (see below), whose sum is σ = 844135344. Its totient is φ = 547950592.

The previous prime is 694164083. The next prime is 694164091. The reversal of 694164085 is 580461496.

It can be written as a sum of positive squares in 8 ways, for example, as 195356529 + 498807556 = 13977^2 + 22334^2 .

It is a cyclic number.

It is not a de Polignac number, because 694164085 - 2¹ = 694164083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694164083) 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 in 15 ways as a sum of consecutive naturals, for example, 129009 + ... + 134281.

It is an arithmetic number, because the mean of its divisors is an integer number (52758459).

Almost surely, 2^694164085 is an apocalyptic number.

It is an amenable number.

694164085 is a deficient number, since it is larger than the sum of its proper divisors (149971259).

694164085 is a wasteful number, since it uses less digits than its factorization.

694164085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 694164085 is about 26346.9938512916. The cubic root of 694164085 is about 885.4296210651.

The spelling of 694164085 in words is "six hundred ninety-four million, one hundred sixty-four thousand, eighty-five".