30000689 has 2 divisors, whose sum is σ = 30000690. Its totient is φ = 30000688.

The previous prime is 30000683. The next prime is 30000721. The reversal of 30000689 is 98600003.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17098225 + 12902464 = 4135^2 + 3592^2 .

It is an emirp because it is prime and its reverse (98600003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30000689 - 2²⁰ = 28952113 is a prime.

It is not a weakly prime, because it can be changed into another prime (30000683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000344 + 15000345.

It is an arithmetic number, because the mean of its divisors is an integer number (15000345).

Almost surely, 2^30000689 is an apocalyptic number.

It is an amenable number.

30000689 is a deficient number, since it is larger than the sum of its proper divisors (1).

30000689 is an equidigital number, since it uses as much as digits as its factorization.

30000689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 30000689 is about 5477.2884714976. The cubic root of 30000689 is about 310.7256293363.

The spelling of 30000689 in words is "thirty million, six hundred eighty-nine", and thus it is an aban number.