30231689 has 2 divisors, whose sum is σ = 30231690. Its totient is φ = 30231688.

The previous prime is 30231667. The next prime is 30231739. The reversal of 30231689 is 98613203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 1982464 = 5315^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231689 - 2⁸ = 30231433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30234689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115844 + 15115845.

It is an arithmetic number, because the mean of its divisors is an integer number (15115845).

Almost surely, 2^30231689 is an apocalyptic number.

It is an amenable number.

30231689 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231689 is an equidigital number, since it uses as much as digits as its factorization.

30231689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 30231689 is about 5498.3351116497. The cubic root of 30231689 is about 311.5211019493.

The spelling of 30231689 in words is "thirty million, two hundred thirty-one thousand, six hundred eighty-nine".