699068609 has 2 divisors, whose sum is σ = 699068610. Its totient is φ = 699068608.

The previous prime is 699068593. The next prime is 699068633. The reversal of 699068609 is 906860996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690217984 + 8850625 = 26272^2 + 2975^2 .

It is a cyclic number.

It is not a de Polignac number, because 699068609 - 2⁴ = 699068593 is a prime.

It is not a weakly prime, because it can be changed into another prime (699068009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349534304 + 349534305.

It is an arithmetic number, because the mean of its divisors is an integer number (349534305).

Almost surely, 2^699068609 is an apocalyptic number.

It is an amenable number.

699068609 is a deficient number, since it is larger than the sum of its proper divisors (1).

699068609 is an equidigital number, since it uses as much as digits as its factorization.

699068609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 699068609 is about 26439.9056163217. The cubic root of 699068609 is about 887.5100241941.

The spelling of 699068609 in words is "six hundred ninety-nine million, sixty-eight thousand, six hundred nine".