306699489 has 6 divisors (see below), whose sum is σ = 443010386. Its totient is φ = 204466320.

The previous prime is 306699479. The next prime is 306699509. The reversal of 306699489 is 984996603.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 191351889 + 115347600 = 13833^2 + 10740^2 .

It is not a de Polignac number, because 306699489 - 2⁷ = 306699361 is a prime.

It is a super-2 number, since 2×306699489² = 188129153105722242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (306699439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17038852 + ... + 17038869.

Almost surely, 2^306699489 is an apocalyptic number.

It is an amenable number.

306699489 is a deficient number, since it is larger than the sum of its proper divisors (136310897).

306699489 is a wasteful number, since it uses less digits than its factorization.

306699489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34077727 (or 34077724 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 306699489 is about 17512.8378340005. The cubic root of 306699489 is about 674.3794857152.

The spelling of 306699489 in words is "three hundred six million, six hundred ninety-nine thousand, four hundred eighty-nine".