699648289 has 2 divisors, whose sum is σ = 699648290. Its totient is φ = 699648288.

The previous prime is 699648259. The next prime is 699648307. The reversal of 699648289 is 982846996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654489889 + 45158400 = 25583^2 + 6720^2 .

It is a cyclic number.

It is not a de Polignac number, because 699648289 - 2⁹ = 699647777 is a prime.

It is not a weakly prime, because it can be changed into another prime (699648259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349824144 + 349824145.

It is an arithmetic number, because the mean of its divisors is an integer number (349824145).

Almost surely, 2^699648289 is an apocalyptic number.

It is an amenable number.

699648289 is a deficient number, since it is larger than the sum of its proper divisors (1).

699648289 is an equidigital number, since it uses as much as digits as its factorization.

699648289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 61.

The square root of 699648289 is about 26450.8655623970. The cubic root of 699648289 is about 887.7552693993.

The spelling of 699648289 in words is "six hundred ninety-nine million, six hundred forty-eight thousand, two hundred eighty-nine".