699497489 has 2 divisors, whose sum is σ = 699497490. Its totient is φ = 699497488.

The previous prime is 699497479. The next prime is 699497497. The reversal of 699497489 is 984794996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698016400 + 1481089 = 26420^2 + 1217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-699497489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (699497479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349748744 + 349748745.

It is an arithmetic number, because the mean of its divisors is an integer number (349748745).

Almost surely, 2^699497489 is an apocalyptic number.

It is an amenable number.

699497489 is a deficient number, since it is larger than the sum of its proper divisors (1).

699497489 is an equidigital number, since it uses as much as digits as its factorization.

699497489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 65.

The square root of 699497489 is about 26448.0148404375. The cubic root of 699497489 is about 887.6914834866.

The spelling of 699497489 in words is "six hundred ninety-nine million, four hundred ninety-seven thousand, four hundred eighty-nine".