694043069 has 2 divisors, whose sum is σ = 694043070. Its totient is φ = 694043068.

The previous prime is 694043041. The next prime is 694043081. The reversal of 694043069 is 960340496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625650169 + 68392900 = 25013^2 + 8270^2 .

It is a cyclic number.

It is not a de Polignac number, because 694043069 - 2⁸ = 694042813 is a prime.

It is a super-2 number, since 2×694043069² = 963391563253877522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694043029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347021534 + 347021535.

It is an arithmetic number, because the mean of its divisors is an integer number (347021535).

Almost surely, 2^694043069 is an apocalyptic number.

It is an amenable number.

694043069 is a deficient number, since it is larger than the sum of its proper divisors (1).

694043069 is an equidigital number, since it uses as much as digits as its factorization.

694043069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 694043069 is about 26344.6971703984. The cubic root of 694043069 is about 885.3781647497.

The spelling of 694043069 in words is "six hundred ninety-four million, forty-three thousand, sixty-nine".