30985723 has 2 divisors, whose sum is σ = 30985724. Its totient is φ = 30985722.

The previous prime is 30985711. The next prime is 30985729. The reversal of 30985723 is 32758903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30985723 - 2⁹ = 30985211 is a prime.

It is not a weakly prime, because it can be changed into another prime (30985729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15492861 + 15492862.

It is an arithmetic number, because the mean of its divisors is an integer number (15492862).

Almost surely, 2^30985723 is an apocalyptic number.

30985723 is a deficient number, since it is larger than the sum of its proper divisors (1).

30985723 is an equidigital number, since it uses as much as digits as its factorization.

30985723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 30985723 is about 5566.4821027288. The cubic root of 30985723 is about 314.0898325741.

The spelling of 30985723 in words is "thirty million, nine hundred eighty-five thousand, seven hundred twenty-three".