694390069 has 2 divisors, whose sum is σ = 694390070. Its totient is φ = 694390068.

The previous prime is 694390061. The next prime is 694390091. The reversal of 694390069 is 960093496.

694390069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440370225 + 254019844 = 20985^2 + 15938^2 .

It is a cyclic number.

It is not a de Polignac number, because 694390069 - 2³ = 694390061 is a prime.

It is a super-2 number, since 2×694390069² = 964355135851649522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694390061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347195034 + 347195035.

It is an arithmetic number, because the mean of its divisors is an integer number (347195035).

Almost surely, 2^694390069 is an apocalyptic number.

It is an amenable number.

694390069 is a deficient number, since it is larger than the sum of its proper divisors (1).

694390069 is an equidigital number, since it uses as much as digits as its factorization.

694390069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 694390069 is about 26351.2821130206. The cubic root of 694390069 is about 885.5256940361.

The spelling of 694390069 in words is "six hundred ninety-four million, three hundred ninety thousand, sixty-nine".