30471689 has 2 divisors, whose sum is σ = 30471690. Its totient is φ = 30471688.

The previous prime is 30471673. The next prime is 30471691. The reversal of 30471689 is 98617403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 11505664 = 4355^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 30471689 - 2⁴ = 30471673 is a prime.

Together with 30471691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30471629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15235844 + 15235845.

It is an arithmetic number, because the mean of its divisors is an integer number (15235845).

Almost surely, 2^30471689 is an apocalyptic number.

It is an amenable number.

30471689 is a deficient number, since it is larger than the sum of its proper divisors (1).

30471689 is an equidigital number, since it uses as much as digits as its factorization.

30471689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 30471689 is about 5520.1167560116. The cubic root of 30471689 is about 312.3432865440.

The spelling of 30471689 in words is "thirty million, four hundred seventy-one thousand, six hundred eighty-nine".