690719069 has 2 divisors, whose sum is σ = 690719070. Its totient is φ = 690719068.

The previous prime is 690719063. The next prime is 690719093. The reversal of 690719069 is 960917096.

It is a happy number.

690719069 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., 610831225 + 79887844 = 24715^2 + 8938^2 .

It is a cyclic number.

It is not a de Polignac number, because 690719069 - 2⁴ = 690719053 is a prime.

It is a super-2 number, since 2×690719069² = 954185664560453522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690719063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345359534 + 345359535.

It is an arithmetic number, because the mean of its divisors is an integer number (345359535).

Almost surely, 2^690719069 is an apocalyptic number.

It is an amenable number.

690719069 is a deficient number, since it is larger than the sum of its proper divisors (1).

690719069 is an equidigital number, since it uses as much as digits as its factorization.

690719069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 690719069 is about 26281.5347535109. The cubic root of 690719069 is about 883.9624467063.

The spelling of 690719069 in words is "six hundred ninety million, seven hundred nineteen thousand, sixty-nine".